Cable disconnected with macintosh and sg200 26 cisco router

I owe a SG200 26 port switch and it works fine so far.
Amacintosh computer (mountain lion) has been added to the wired net. Everything works fine t first, but there's a sudden disconnection issue.
It seems that the macintosh computer is not able to communicate to the switch, and the macintosh prompts a lack of cable connection. None of the lights on the switch are on.
If I plug the macintosh cable directly to a router ethernet port, it works properly.
I need some advise about that, please.
Does anybody know anything?
Thanks.

Hello everybody,
I encountered a similar problem with my 2011 iMac 27 and a Cisco SG300-10. Especially after coming from hibernation the Mac claims to have no ethernet connection (no physical cable attached) from time to time, although lights on the switch are on. I need to reboot the Mac in order to get the connection back.
Above that there seems to be some trouble negotiating the correct settings between those two devices. This is some typical console output from the Mac regarding its en0 interface after the wakeup:
19.01.13 09:17:13,000 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link down on en0
19.01.13 09:17:17,000 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link up on en0, 1-Gigabit, Full-duplex, No flow-control, Debug [796d,2301,0de1,0300,c1e1,0800]
19.01.13 09:17:19,000 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link down on en0
19.01.13 09:17:21,000 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link up on en0, 1-Gigabit, Full-duplex, No flow-control, Debug [796d,2303,0de1,0300,c1e1,0800]
19.01.13 09:17:23,000 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link down on en0
19.01.13 09:17:25,000 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link up on en0, 1-Gigabit, Full-duplex, No flow-control, Debug [796d,2303,0de1,0300,c1e1,7800]
19.01.13 09:17:34,453 configd[16]: network changed: v6(en0+:fe80::2665:11ff:fe97:88b3) DNS+ Proxy+ SMB
19.01.13 09:17:36,275 configd[16]: network changed: v4(en0+:192.168.0.14) v6(en0:fe80::2665:11ff:fe97:88b3) DNS! Proxy SMB
19.01.13 09:17:45,000 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link down on en0 (wol enabled, BJP 818)
19.01.13 09:17:49,493 configd[16]: network changed: v4(en0-:192.168.0.14) v6(en0-:fe80::2665:11ff:fe97:88b3) DNS- Proxy- SMB-
19.01.13 09:18:04,000 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link up on en0, 1-Gigabit, Full-duplex, No flow-control, Debug [796d,0300,0de1,0300,c1e1,0800]
19.01.13 09:18:05,000 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link down on en0
19.01.13 09:18:08,000 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link up on en0, 1-Gigabit, Full-duplex, No flow-control, Debug [796d,0300,0de1,0300,c1e1,0800]
19.01.13 09:18:09,000 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link down on en0
19.01.13 09:18:12,000 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link up on en0, 1-Gigabit, Full-duplex, No flow-control, Debug [796d,0301,0de1,0300,c1e1,0800]
19.01.13 09:18:14,000 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link down on en0
19.01.13 09:18:17,000 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link up on en0, 1-Gigabit, Full-duplex, No flow-control, Debug [796d,0f00,0de1,0300,c1e1,7800]
19.01.13 09:18:20,111 mDNSResponder[40]: mDNS_RegisterInterface: Frequent transitions for interface en0 (FE80:0000:0000:0000:426C:8FFF:FE15:B51E)
19.01.13 09:18:21,970 configd[16]: network changed: v6(en0+:fe80::2665:11ff:fe97:88b3) DNS+ Proxy+ SMB
19.01.13 09:18:28,448 configd[16]: network changed: v4(en0+:192.168.0.14) v6(en0:fe80::2665:11ff:fe97:88b3) DNS! Proxy SMB
19.01.13 09:18:28,450 mDNSResponder[40]: mDNS_RegisterInterface: Frequent transitions for interface en0 (192.168.0.14)
19.01.13 09:19:04,000 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link down on en0 (wol enabled, BJP 826)
19.01.13 09:19:07,000 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link up on en0, 100-Megabit, Full-duplex, No flow-control, Debug [796d,0321,0181,0000,c1e1,0800]
19.01.13 09:19:08,184 configd[16]: network changed: v4(en0-:192.168.0.14) v6(en0-:fe80::2665:11ff:fe97:88b3) DNS- Proxy- SMB-
19.01.13 09:19:08,185 configd[16]: arp_client_transmit(en0) failed, Network is down (50)
19.01.13 09:19:08,185 configd[16]: bootp_session_transmit: bpf_write(en0) failed: Network is down (50)
19.01.13 09:19:08,185 configd[16]: DHCP en0: INIT-REBOOT transmit failed
19.01.13 09:19:08,186 configd[16]: DHCP en0: ARP detect ROUTER failed, arp_client_transmit(en0) failed, Network is down (50)
19.01.13 09:19:08,187 mDNSResponder[40]: DeregisterInterface: Frequent transitions for interface en0 (192.168.0.14)
As you can see, the link goes up and down like the Santa Maria on Columbus' first expedition. In addition to that there is no "EEE enabled" entry although the network chipset (BCM57765) is EEE compatible and the Cisco affirms "EEE Support on Remote" for the specific port.
I don't know if there is something wrong with the Mac OS X network driver (10.8.2) or with the switch firmware, at least I thought I let you know and maybe you can take a look or have a hint.
Regards,
Christoph

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Hi Everybody,
I need help for my work now, I appreciate if someone can fix my problem.I have a Cisco router 3925 and access Internet via PPPoE link. I want config VPN Remote Access and using software Cisco VPN client. But it doesn't work.. Here my config router :
HUNRE#show running-config
Building configuration...
Current configuration : 5515 bytes
! No configuration change since last restart
version 15.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
hostname HUNRE
boot-start-marker
boot-end-marker
enable secret 5 $1$vEFw$rLfvLglzUgddCVwXDx03K.
enable password cisco
aaa new-model
aaa session-id common
crypto pki trustpoint TP-self-signed-1050416327
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-1050416327
revocation-check none
rsakeypair TP-self-signed-1050416327
crypto pki certificate chain TP-self-signed-1050416327
certificate self-signed 01
3082022B 30820194 A0030201 02020101 300D0609 2A864886 F70D0101 05050030
31312F30 2D060355 04031326 494F532D 53656C66 2D536967 6E65642D 43657274
69666963 6174652D 31303530 34313633 3237301E 170D3134 30393235 31313534
31395A17 0D323030 31303130 30303030 305A3031 312F302D 06035504 03132649
4F532D53 656C662D 5369676E 65642D43 65727469 66696361 74652D31 30353034
31363332 3730819F 300D0609 2A864886 F70D0101 01050003 818D0030 81890281
8100CC79 74FCFABE 81183B70 5A9F4A53 EB609754 7D5F8587 9150B76E 3207A86E
5B65F9E9 6CDAC21A 6D69221D 1FF61632 14763308 43B2A1CC 8EE5ABAC EF07530E
3F0D35FE F08C955B 60B52B92 F8F54D53 DD6DD623 01F83493 02F9C49A F0C3483D
3B48A008 8D96700E 88924BFE DE00201B DE5965DE 32898CAD 9012AB55 76B6F39B
2D470203 010001A3 53305130 0F060355 1D130101 FF040530 030101FF 301F0603
551D2304 18301680 14C3418C BC35F3D9 B26B2475 2BB5F826 060525AB B3301D06
03551D0E 04160414 C3418CBC 35F3D9B2 6B24752B B5F82606 0525ABB3 300D0609
2A864886 F70D0101 05050003 81810070 AC7C26C6 4606A551 1A3FD6C5 2A5AEAE8
35DAC86E F8885E26 51F6EEAE 7565D3AA D532C8F3 55F6656F D103F38C 8FBDE7F1
83E77143 76469040 7FEA41E8 14963DB3 F7F28EA0 C5F2F42C B186B75C AAB04900
15F9CB38 A16964F5 4E7B4378 35041AA8 AE8EC181 D58D6A62 676E286A 7B9D80E6
35A0B9FB FB76E976 3D2A19D7 006078
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ip name-server 210.245.1.253
ip name-server 210.245.1.254
ip cef
no ipv6 cef
multilink bundle-name authenticated
vpdn enable
vpdn-group 1
vpdn-group 2
license udi pid C3900-SPE100/K9 sn FOC1823839B
license boot module c3900 technology-package securityk9
username cisco privilege 15 secret 5 $1$aAjB$D3iLyPFTE7O1bHPnKSJcH0
username kdhong privilege 15 secret 5 $1$nfyX$FO1BPTabCUaE6uKQwpLT.1
redundancy
track 1 ip sla 1 reachability
track 2 ip sla 2 reachability
crypto isakmp policy 1
encr 3des
authentication pre-share
group 2
crypto isakmp client configuration group VPN-HUNRE
key hunre
dns 8.8.8.8
domain hunre
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acl 199
max-users 100
crypto ipsec transform-set encrypt-method-1 esp-3des esp-sha-hmac
mode tunnel
crypto dynamic-map DYNMAP 1
set transform-set encrypt-method-1
crypto map VPN client configuration address respond
crypto map VPN 65535 ipsec-isakmp dynamic DYNMAP
interface Embedded-Service-Engine0/0
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shutdown
interface GigabitEthernet0/0
ip address 192.168.1.1 255.255.255.0
ip mtu 1492
ip nat inside
ip virtual-reassembly in
ip tcp adjust-mss 1412
duplex auto
speed auto
interface GigabitEthernet0/1
description FPT
no ip address
ip tcp adjust-mss 1412
duplex auto
speed auto
pppoe enable group global
pppoe-client dial-pool-number 1
interface GigabitEthernet0/2
description Connect to CMC
no ip address
ip mtu 1442
ip nat outside
ip virtual-reassembly in
ip tcp adjust-mss 1412
duplex auto
speed auto
pppoe enable group global
pppoe-client dial-pool-number 2
no cdp enable
interface Dialer1
ip address negotiated
ip mtu 1452
ip nat outside
ip virtual-reassembly in
encapsulation ppp
dialer pool 1
dialer-group 1
ppp authentication chap pap callin
ppp chap hostname [USERNAME]
ppp chap password 0 [PASSWORD]
ppp pap sent-username [USERNAME] password 0 [PASSWORD]
ppp ipcp dns request
crypto map VPN
interface Dialer2
description Logical ADSL Interface 2
ip address negotiated
ip mtu 1442
ip nat outside
ip virtual-reassembly in
encapsulation ppp
ip tcp adjust-mss 1344
dialer pool 2
dialer-group 2
ppp authentication chap pap callin
ppp chap hostname [USERNAME]
ppp chap password 0 [PASSWORD]
ppp pap sent-username [USERNAME] password 0 [PASSWORD]
ppp ipcp address accept
no cdp enable
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ip forward-protocol nd
ip http server
ip http authentication local
ip http secure-server
ip nat inside source list 10 interface Dialer1 overload
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line 2
no activation-character
no exec
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transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
line vty 0 4
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transport input all
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ntp master
end
However, I cannot ping interfac Dialer 1. I using Cisco vpn client software ver 5.0.07.0290.
Hopeful for your answers !
Thanks

Hi David Castro,
Thanks for your answer,
I configed following your guide, but it have not worked yet. I saw that I cannot ping IP gateway Internet . I using ADSL Internet and config PPPoE and my router receive IP from ISP. Here show ip int brief :
GigabitEthernet0/0         192.168.1.1     YES NVRAM up                    up
GigabitEthernet0/1         unassigned      YES NVRAM up                    up
GigabitEthernet0/2         unassigned      YES NVRAM up                    up
Dialer1                    210.245.54.49   YES IPCP   up                    up
Dialer2                    101.99.7.73     YES IPCP   up                    up
NVI0                       192.168.1.1     YES unset up                    up
Virtual-Access1            unassigned      YES unset up                    up
Virtual-Access2            unassigned      YES unset up                    up
Virtual-Access3            unassigned      YES unset up                    up
But I cannot ping Interface Dialer 1, so may be VPN is does not worked. Do you have some ideal ?
Thanks very much !

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So I am requesting help from the Cisco community on this issue as the cable company states there equipment is working fine. At all my facilities I have a guest Internet service setup through a local Internet provide to provide Internet services to the residents and guests. I have the cable modem usually a Motorola SBG6580 or a SMC 8014 (both provided by cable company) connected to my router on a FE or GE interface. I am using static IPs and using the cable modem just as a modem (bridge mode). Over the past several months these connections have just stopped working. I have not made any drastic changes to my router configs; however, the cable company has updated the firmware on these modems. I am wondering if that could affected how the modem and router talk. I was told by the cable company that the modem sees the Cisco router but that the port is inactive. My router shows the port is active and traffic passing. Does anyone have any ideas that could point where the problem lies? I will post a basic config to one that currently does not work. I am using a VRF to route a certain group out, using NAT. Please let me know if I need to post additional info. Any help would be greatly appreciated.
Cisco CISCO2911/K9
Version 15.2(3)T1
service timestamps debug datetime localtime
service timestamps log datetime localtime show-timezone
service password-encryption
hostname 1204RTR01
boot-start-marker
boot system flash0:c2900-universalk9-mz.SPA.152-3.T1.bin
boot system flash0:c2900-universalk9-mz.SPA.151-3.T.bin
boot-end-marker
card type t1 0 0
logging buffered 64000
aaa new-model
aaa session-id common
clock timezone cst -6 0
clock summer-time CDT recurring
no ipv6 cef
no ip source-route
ip vrf 5
rd 5:1
ip multicast-routing
1
ip dhcp pool Guest
vrf 5
network 10.51.XXX.0 255.255.255.0
default-router 10.51.XXX.XXX
dns-server 209.18.47.61 209.18.47.62
ip flow-cache timeout active 1
no ip bootp server
no ip domain lookup
ip cef
multilink bundle-name authenticated
application
global
service alternate default
license udi pid CISCO2911/K9 sn FTX1508AHTM
hw-module pvdm 0/0
redundancy
ip tcp synwait-time 10
interface GigabitEthernet0/0.5
description Guest VLAN
encapsulation dot1Q 5
ip vrf forwarding 5
ip address 10.51.xx.xxx 255.255.255.0
no ip redirects
no ip proxy-arp
ip nat inside
ip virtual-reassembly in
ip tcp adjust-mss 1452
interface GigabitEthernet0/1
no ip address
duplex auto
speed auto
interface GigabitEthernet0/2
description Guest Intenet access
ip vrf forwarding 5
ip address 24.242.182.182 255.255.255.252   <--Cable company IP, Modem IP is 24.242.182.181
ip nat outside
ip virtual-reassembly in
load-interval 30
duplex auto
speed auto
ip forward-protocol nd
no ip http server
ip http authentication local
no ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
ip nat inside source list 9 interface GigabitEthernet0/2 vrf 5 overload
ip route vrf 5 0.0.0.0 0.0.0.0 24.242.182.181
access-list 9 permit 10.51.204.0 0.0.0.255

Ok, mysteriously this location just started working yesterday, but I still am dealing with seven others and I really would like to know what is going on. I will give you everything you may need and let me know.
Config:
version 15.2
no service pad
service timestamps debug datetime localtime
service timestamps log datetime localtime show-timezone
service password-encryption
hostname 1112RTR01
boot-start-marker
boot system flash0:c2900-universalk9-mz.SPA.152-3.T1.bin
boot system flash0:c2900-universalk9-mz.SPA.151-1.T.bin
boot-end-marker
aaa new-model
aaa session-id common
clock timezone CDT -6 0
clock summer-time CDT recurring
network-clock-participate wic 0
network-clock-select 1 T1 0/0/0
no ipv6 cef
no ip source-route
ip vrf GuestVRF
rd 5:1
ip multicast-routing
ip dhcp pool Guest
vrf GuestVRF
network 10.51.112.0 255.255.255.0
default-router 10.51.112.1
dns-server 209.18.47.61 209.18.47.62
ip flow-cache timeout active 1
no ip bootp server
no ip domain lookup
ip cef
application
global
service alternate default
interface Embedded-Service-Engine0/0
no ip address
shutdown
interface GigabitEthernet0/0.5
description Guest VLAN
encapsulation dot1Q 5
ip vrf forwarding GuestVRF
ip address 10.51.112.1 255.255.255.0
no ip redirects
no ip proxy-arp
ip nat inside
ip virtual-reassembly in
ip tcp adjust-mss 1452
interface GigabitEthernet0/1
description Guest Internet (Time Warner Connection)
ip vrf forwarding GuestVRF
ip address 97.77.116.234 255.255.255.252
ip nat outside
ip virtual-reassembly in
load-interval 30
duplex auto
speed auto
ip forward-protocol nd
ip nat inside source list 5 interface GigabitEthernet0/1 vrf GuestVRF overload
ip route vrf GuestVRF 0.0.0.0 0.0.0.0 97.77.116.233
access-list 5 permit 10.51.112.0 0.0.0.255
control-plane
end
router#sh ip arp vrf GuestVRF
router#Internet 97.77.116.233           2   f80b.bee7.e09f ARPA   GigabitEthernet0/1
Protocol Address          Age (min) Hardware Addr   Type   Interface
Internet 97.77.116.234           -   8843.e13c.8d99 ARPA   GigabitEthernet0/1
router#ping vrf GuestVRF 97.77.116.233
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 97.77.116.233, timeout is 2 seconds:
Success rate is 0 percent (0/5)
router#sh int g0/1
GigabitEthernet0/1 is up, line protocol is up
Hardware is CN Gigabit Ethernet, address is 8843.e13c.8d99 (bia 8843.e13c.8d99)
Description: Guest Internet (Time Warner Connection)
Internet address is 97.77.116.234/30
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full Duplex, 1Gbps, media type is RJ45
output flow-control is XON, input flow-control is XON
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 00:00:10
Input queue: 76/75/15/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 3000 bits/sec, 7 packets/sec
30 second output rate 0 bits/sec, 0 packets/sec
     81 packets input, 4860 bytes, 0 no buffer
     Received 81 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 12 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     16 packets output, 1193 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
router#sh int g0/1
GigabitEthernet0/1 is up, line protocol is up
Hardware is CN Gigabit Ethernet, address is 8843.e13c.8d99 (bia 8843.e13c.8d99)
Description: Guest Internet (Time Warner Connection)
Internet address is 97.77.116.234/30
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full Duplex, 1Gbps, media type is RJ45
output flow-control is XON, input flow-control is XON
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 00:00:42
Input queue: 76/75/67/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 3000 bits/sec, 7 packets/sec
30 second output rate 1000 bits/sec, 2 packets/sec
     408 packets input, 24480 bytes, 0 no buffer
     Received 408 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 61 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     72 packets output, 5669 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
I am receiving packets in and out of the interface but I cannot ping the modem through the VRF.
router#sh ip nat translations
Pro Inside global      Inside local       Outside local      Outside global
udp 97.77.116.234:3169 10.51.112.39:3169 209.18.47.62:53    209.18.47.62:53
udp 97.77.116.234:8534 10.51.112.39:8534 209.18.47.61:53    209.18.47.61:53
udp 97.77.116.234:12244 10.51.112.39:12244 209.18.47.61:53   209.18.47.61:53
udp 97.77.116.234:14002 10.51.112.39:14002 209.18.47.61:53   209.18.47.61:53
udp 97.77.116.234:23623 10.51.112.39:23623 209.18.47.62:53   209.18.47.62:53
udp 97.77.116.234:24489 10.51.112.39:24489 209.18.47.61:53   209.18.47.61:53
udp 97.77.116.234:24550 10.51.112.39:24550 209.18.47.61:53   209.18.47.61:53
udp 97.77.116.234:27458 10.51.112.39:27458 209.18.47.62:53   209.18.47.62:53
udp 97.77.116.234:28603 10.51.112.39:28603 209.18.47.62:53   209.18.47.62:53
udp 97.77.116.234:37404 10.51.112.39:37404 209.18.47.62:53   209.18.47.62:53
udp 97.77.116.234:53942 10.51.112.39:53942 209.18.47.61:53   209.18.47.61:53
udp 97.77.116.234:58125 10.51.112.39:58125 209.18.47.62:53   209.18.47.62:53
udp 97.77.116.234:64797 10.51.112.39:64797 209.18.47.61:53   209.18.47.61:53
udp 97.77.116.234:56925 10.51.112.52:56925 209.18.47.61:53   209.18.47.61:53
udp 97.77.116.234:56925 10.51.112.52:56925 209.18.47.62:53   209.18.47.62:53
udp 97.77.116.234:62342 10.51.112.52:62342 209.18.47.62:53   209.18.47.62:53
tcp 97.77.116.234:36559 10.51.112.69:36559 199.167.177.46:1227 199.167.177.46:1227
tcp 97.77.116.234:48895 10.51.112.69:48895 54.195.253.126:5223 54.195.253.126:5223
tcp 97.77.116.234:58385 10.51.112.69:58385 54.195.243.137:5223 54.195.243.137:5223
Pro Inside global      Inside local       Outside local      Outside global
tcp 97.77.116.234:58658 10.51.112.71:58658 31.13.66.165:443 31.13.66.165:443
udp 97.77.116.234:3066 10.51.112.72:3066 209.18.47.62:53    209.18.47.62:53
udp 97.77.116.234:3884 10.51.112.72:3884 209.18.47.61:53    209.18.47.61:53
udp 97.77.116.234:6656 10.51.112.72:6656 209.18.47.61:53    209.18.47.61:53
udp 97.77.116.234:11194 10.51.112.72:11194 209.18.47.61:53   209.18.47.61:53
udp 97.77.116.234:11774 10.51.112.72:11774 209.18.47.62:53   209.18.47.62:53
Let me know if you need anything else. I need to figure this out and I just don't get it because the other site wasn't working a few days ago and all of a sudden it is working again but others are still not.

Vlans and cisco router

I have a netgear managed switch and a cisco 1750 router. I would like to set up 2 vlans. the first one is a wan, with a residential cable model connected to it. the other vlan is for my private lan. I will then have the cisco router connected to one port on the switch set up as a trunk. I'm no pro, but from what I've read so far, it should work that way, right? the part I need help with is setting up the cisco router as a gateway and dns proxy, accepting the dynamic ip, gateway, and dns addresses from the cable modem.
I did see this http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Network%20Infrastructure&topic=Getting%20Started%20with%20LANs&CommCmd=MB%3Fcmd%3Ddisplay_location%26location%3D.1ddcef50
router in a stick *write that down* so my setup should work if I can figure out the router configuration. a good online tutorial or something would be helpful for this. I have plenty of cisco books, but maybe something for dummies would help me get started, before digging into the tough stuff.

In order to set up inter vlan routing or a "router on a stick" with a netgear switch you will need a router that supports IEEE 802.1q VLAN Support.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120t/120t1/8021q.htm#28767
On the router interface that is "trunked" to the switch you will need to have a configuration that looks like the what I have below.
Router(config)#interface FastEthernet0/1.1
Router(config-subif)#encapsulation dot1Q 1 native
Router(config-subif)#ip address 10.xx.xx.16 255.255.255.xxx
Router(config-subif)#interface FastEthernet0/1.2
Router(config-subif)#encapsulation dot1Q 2
Router(config-subif)#ip address 10.xx.xx.130 255.255.255.xxx
The sub-interface 1."2" corresponds to the vlan id on the trunk. In this case the .2 is vlan 2.
I have attahced a link that exlains the intricate details on inter vlan routing below:
http://www.cisco.com/warp/public/473/50.shtml
Lastly you may want to check the Cisco IOS feature Navigator. I was looking at it and I did not see that the 1750 has IEEE 802.1q VLAN Support. It looks like the 1751 is the first platform in the 1700 series that does.

Z77A-GD65 Ethernet Problems "Network Cable Disconnected"

I've been running a Z77A-GD65 and have been having network problems with the onboard ethernet. Every time I go to play a game online I'll play for about 10-15 minutes and I'll be disconnected. When I'm back on the desktop, my ethernet icon on the taskbar will show "network cable disconnected" even though everything is plugged in fine. Fiddling with the cable or changing the cable does nothing. Reboot the machine and it's working fine until again I play a game for 10 or 15 minutes and the same thing happens.
First, the card was showing the wrong MAC address as specified in the MSI FAQ for this mobo. Performed the fix but the problem is persisting. Tried the MSI driver and the newer Intel one. One time I got a "Code 10" error as posted in another thread and again, wouldn't correct itself until I rebooted.
This only happens when I'm playing games. Web surfing or downloads work fine and my connection won't be disconnected until about 10-15 minutes into playing an online game.
I put in another discrete Intel network card and that worked fine. No problems. Same with plugging in a USB wifi adapter (my current temporary solution). Therefore, I'm thinking it's an issue with the onboard ethernet or driver. Anyone else with this problem or how to resolve it? Using the latest v10.5 MSI BIOS.

Removing the Asus Xonar did not help.
Re-flashed the BIOS as well using a DOS boot USB key instead of M-Flash. Readjusted all setting to default. Enabled/disabled "Network Stack" in the BIOS (what is this supposed to do anyhow? It's undocumented).
Wiped all drivers for this network adapter and re-installed the current ones from MSI's website. No change.
Noticed that the adapter would correctly run at gigabit full-duplex when set to auto-negitiate. However, it would drop down to 10mbps before it finally showed "cable disconnected". Plugging and unplugging the cable did nothing until I reboot, then it would work again... until I ran a game online and it would disconnect after 10-15 minutes of play. Ran the Intel cable test and it was fine (and the cable and internet has been fine when used in conjunction with another discrete PCI-e Intel card).
Re-crimped the ends to be sure. Tested again and the cable connection is good. Yes I know how to crimp ethernet so please don't suggest anything being wrong with the cable.
I've pretty well nailed down that it is an issue with the onboard ethernet. I've read on Intel forums about problems with this chip on Asus boards. Hopefully an MSI employee can point me in a direction that could help, or at least have the problem resolved in a future BIOS update.

Airport Time capsule behind cisco router download speed

My airport time capsule is connected to the internet in bridge mode via a cisco router.
The cisco router provides a 99Mbps download speed. However, when I " bridge" my time capsule in between (wired) the speed slows down to 9 Mbps.
I have already tried to assign a static DHCP IP to my time capsules MAC address and disabled DMZ for that specific IP address, but am failing to get the speed up to par.
Any suggestions?

I have used Time capsule 1.5 year behind a copperjet modem on ADSL, no problems.
Changed provider and am connected by cable with new cisco modem including router.
So the set up looks like:
internet>cisco modem/router>airport time capsule>macbook pro
The cisco modem without airport time capsule is working ok: when logged in speed is 99 Mbps as it should be (wired and wireless)
Connecting cisco router with UTP cable to time capsule and time capsule with UTP to macbook slows down speed to 9 Mbps
(time capsule in bridgemode)
Specs:
Macbook pro OSX yosemite
Airport Time capsule 2TB 2013 (v 7.7.3)
Cisco modem/router:EPC3928

WRVS4400S Cisco Router to Fortinet VPN Issue

I created the VPN between WRCS4400N and Fortinet 111c and tunnel is up. When i am pinging my cisco subnet (10.0.20.0) from fortinet, its pinging. But when i am pinging fortinet (10.0.1.8) or any ip of this subnet from cisco router its not pinging.
I have real IP on my Fortinet and dyndns on Cisco Router. The simple diagram is attached for my vpn network. I think its routing issue, i have to add route in cisco router but i don't know what route i have to add there in order work the vpn perfectly. kindly help...

Hi Muhammad,
since this question is about a product in the Cisco Small Business / Linksys range, I suggest you move it to the community, where you will have a better chance of getting expert advice.
best regards,
Herbert
Cisco Moderator

IPod says connected,eject before disconnecting with a pict. Of the USB cable. It does this after its been charging and I can not access the menus. Any solutions?a

iPod seems to be frozen. After it has been charing and I remove it foamy PC! It says "connected, eject before disconnecting" with a picture of the USC cable. I can not proceed with this on the screen. Should I reconnect to my pc and do something differently?

Try to perform a hard reset of the iPod, which is about the equivalent of rebooting your PC. To do this, first make sure the hold switch is in the Off position. Then press and hold both the Select (Center) and Menu buttons together long enough for the Apple logo to appear.
B-rock

I tried for update but when i saw the screen its showing an arrow with a USB cable towards itunes icon, and now i'm not able to do anything, i also tried to connect ipad through my laptop but no use

i tried for update but when i saw the screen its showing an arrow with a USB cable towards itunes icon, and now i'm not able to do anything, i also tried to connect ipad through my laptop but no use

That message means that you have to restore the iPad now. There was a problem with the update. So connect the iPad to your computer and restore your iPad.
You can read bout it here.
http://support.apple.com/kb/ht1414
If that does not work you will need recovery mode. You can read about it here.
http://support.apple.com/kb/ht4097
Or you can follow these Recovery Mode Instructions
Disconnect the USB cable from the iPad, but leave the other end of the cable connected to your computer's USB port.
Turn off iPad: Press and hold the Sleep/Wake button for a few seconds until the red slider appears, then slide the slider. Wait for iPad to turn off.
If you cannot turn off iPad using the slider, press and hold the Sleep/Wake and Home buttons at the same time. When the iPad turns off, release the Sleep/Wake and Home buttons.
While pressing and holding the Home button, reconnect the USB cable to iPad. When you reconnect the USB cable, iPad should power on.
Continue holding the Home button until you see the "Connect to iTunes" screen. When this screen appears you can release the Home button.
If necessary, open iTunes. You should see the recovery mode alert that iTunes has detected an iPad in recovery mode.
Use iTunes to restore iPad.

Help with VLANs on SG200-18 and two SG200-08 switches

Hi everybody. My apologies but I'm only average at best with my CISCO skills. I have simple setup running a few network devices connected via 3 CISCO switches. It's small office and there are two rooms - one with servers and one with printer and pc's. Each room has 8-port SG200-08 switch.
Router/ firewall is Sonicwall TZ215 and it handles internal routing between VLAN's. Each SG200-08 was connected directly to TZ215 (no SG200-18 yet) and VLANs were working perfectly. Please see diagram below...
Problems started when I added in the middle larger SG200-18 to handle extra devices. Whatever I'm doing wrong but I can't make VLANs work anymore. Something I'm not setting up correctly in SG200-18.
Please help me to setup VLANS here - tagged, untagged, PVID, trunk........ I'm completely lost and already had to reset SG200-18 twice.
My working setup without 18 port switch was like this.
SG200-08 (1)
    g1 Trunk 1     1U,100T
    g2 Trunk 1     1U
    g3 Trunk 1     1U
    g4 Trunk 1     1U
    g5 Trunk 1     1U
    g6 Trunk 1     1U           SERVER3
    g7 Trunk 100   100U      SERVER1
    g8 Trunk 100   100U      SERVER2
SG200-08 (2)
    g1 Trunk 1     1U,50T,200T
    g2 Trunk 1     1U
    g3 Trunk 1     1U
    g4 Trunk 1     1U         PC1A
    g5 Trunk 1     1U         PC1B
    g6 Trunk 50    50U      PC2A
    g7 Trunk 50    50U      PC2B
    g8 Trunk 200   200U    NETWORK PRINTER
Thank you in advance.

Hello,
Small switches would remain untouched but 200-18 needs to have the following settings:
g15 Trunk 1     1U,100T
g16 Trunk 1     1U,50T,200T
g17 Trunk 1     1U,50T,200T
g18 Trunk 1 1U,50T,100T,200T
Sonicwall now would have only one port connected to SG200-18 with settinngs matching port g18 on big switch.
If you notice there is a change as now you would have only 1 port connecting your network to the Sonicwall, would advise you to use port 17 or 18 since they are uplink ports.
If you have tried to connect two ports to big switch STP would block one of the ports.
Let me know how it is going :-)
Aleksandra

Trouble with Windows7 and Gigabit link on Cisco 3560X switch

Hello,
In my company, we are using Cisco IP Phones 7945G (with 2 gigabit network ports) and Cisco 3560X-48P (1GB ports) switches for our users.
Our client computers are running on Windows 7 SP1 (64bit - Enterprise edition) and are connected behind the IP Phone. We use a "Boradcom
Xtreme Gigabit" onboard network card on the computers. All ports (on the switch site and IP Phone side) and on the network card of the computer are configured in "auto negotiation". Duplex and speed are set to "auto".
We tried now to deploy a new engineering software and we are facing a very strange problem. This means that the engineer software fails to download some files from the server. We are using a flat network, all the servers and computers are on the same network segment with no firewall inbetween.
The firewall and Anti-virus on the computers are configured to allow all incoming/outing connections.
To troubleshoot, I tried to change all the network cables but I still get same result --> download fails.
I connected the client computer directly to the Cisco 3560X switch, without the IP Phone and I get the same result.
I installed a separate network card from INTEL (Intel PRO1000 PT) but I get the same result.
As last test, I have connected to same client computer directly to a Cisco 2960-8TC switch (100Mbit; auto negotiate) and here is working fine. The software successfully downloads all the files from the server.
If I connect the computer behind the Cisco 7945 IP Phone, set the speed and duplex of the PC-Port on the Cisco IP Phone 7945G to "100MBit/full duplex" is also working fine.
Is there any know issue with Windows7 and Gigabit network connections?
Do I need to set any Registry key on my Windows 7?
The firmware version of my Cisco 3560X-48P switch is 12.2(53)SE2; do I need to update it?
The firmware version of the IP Phone 7945G is 9.2.1.
Thanks in advanced for your help.
Marc Hoffmann

Hello, Thanks for your answers. First of all, I have updated the firmware of my Cisco Catalyst 3560X-48P switch to the version 12.2(55)SE5. Unfortunately, this did not solve my problem. As second step, I ran an TDR test on my 3560X switch but I do not get any result. The "Pair status" always says "not completed". Even if I wait for 5 minutes, the status remains at "Not completed". Am I doing something wrong ? To do the TDR test, I use the commande "test cable-diagnostics tdr interface gigabitEthernet 0/XY". For your information, the port gigabitEthernet 0/XY is in a "Connected" status when I run the "show int status" command. Jeff, I think there is no issue on the server side, because if I connect my workstation on a 100MB switch (example Cisco Catalyst 2960-8TC-L) the application works absolutely fine. Also, if I run the application locally on the server, it works fine. As next step, I will connect the workstation directly on our backbone switch and try the same test. Is there perhaps any Registry key in our Windows7 which could cause this trouble? If you have any other ideas or options, please let me know. Thanks a lot, Marc Hoffmann

Cisco 1000Base- LX/LH SFP working with 3560E and 4510R-fiber optical

Dear all,
I have 2 module :Cisco 1000Base- LX/LH SFP . Sw 3560E ( Top-Wig ) Sw 4510R . I want to connect 3560E to 4510R by fiber optical (Singer mode -distance 3km ) use module :Cisco 1000Base- LX/LH SFP.
But when plug module to Sw 3560E (Top- Wig) -Show interface is: " Media card is 1000Base-LX" and plug module to 4510R : " Media Card is 1000Base -LH " . what is this problem ? Pls help me fix module on 3560E to 1000Base-LH
Thanks !

Hi Leolaohoo
I connected cable to module but green led is not display ( both 3560e and 4510r). 3560e can not connect to 4510r. How is change type module on 3560e from LX to LH ? Because module on 4510r - display is LH
Thanks !
-tin nhắn ban đầu-
Chủ đề: - Re: Cisco 1000Base- LX/LH SFP working with 3560E and 4510R-fiber optical
Từ: leolaohoo
Ngày: 24/04/2012 05:19
leolaohoo created the discussion
"Re: Cisco 1000Base- LX/LH SFP working with 3560E and 4510R-fiber optical"
To view the discussion, visit: https://supportforums.cisco.com/message/3618797#3618797

Cable disconnected with macintosh and sg200 26 cisco router

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