3750 and 3850 stackwise

I need to replace 2 3750's in a stack of 5. I will be replacing the remaining 3 3750's later in the year. Can I add two 3850's to the stack? If not, what would be the best way to replace the 2 3750's in the stack that would set everything up later in the year when I can complete replacing the remaining 3750's without having any issues ?

Can I add two 3850's to the stack?
There is no physical way this can be achieved. The stacking cables do not match.

Similar Messages

3750 and 3850 fiber trunk

I currently have two 3750's (stacked). We recently purchased two new 3850's and have stacked them as well. My question is, how to I trunk them? I want to be able to use the new switches with the same vlans and IP addresses as the existing. The new switches are in the same rack as the existing ones.
The current 3750's are the gateway for my network (and they will remain as such, for the time being).
I connected a fiber uplink from switch to switch as in:
3750a (gi 1/0/49) --> 3850a (gi 1/1/1)
3750b (gi 2/0/49) --> 3850b (gi 2/1/1)
I gave the fiber ports the following settings:
3750a:
int gi1/0/49
switchport trunk encaps dot1q
switchport trunk allowed vlan add ALL
switchport mode trunk
switchport nonegotiate
3750b
int gi2/0/49
switchport trunk encaps dot1q
switchport trunk allowed vlan add ALL
switchport mode trunk
switchport nonegotiate
3850a / 3850b:
Gi1/1/1
Gi2/1/1
switchport trunk allowed vlan add ALL
switchport mode trunk
switchport nonegotiate
At this point, I thought I would be able to ssh into the new (3850) switch and ping the current (3750), but I cannot. Network assistant on the curent 3750 switch "sees" the new 3850, but has it listed as "unsupported device". The swiches are on the same subnet (10.11.1.0 /24).
Gateway switch (3750) is 10.11.1.2 and new 3850 is 10.11.1.14. If I plug my laptop into the 3850 and give myself a 10.11.1.x IP, I can ping the switch itself (10.11.1.14), but I cannot ping the gateway (10.11.1.2). If I SSH into the switches, I cannot ping one another.
Do I need to set up the fiber uplinks as an Etherchannel? Or are my switchport settings incorrect? I'm not sure what I am missing. I am in no way an expert on this, so even if its something that may be obvious to others, it is entirely possible I overlooked it.
Hope this makes sense. Any suggestions would be appreciated. Thank you.

Hello, I am still having an issue with this. Below is the configuration for the 3850. I need to mention that there are some routes that are going from the 3750 (ATL core switch) to our Houston location. I don't want to affect those. Here is the new 3850 config:
3850
cisco 3850 is 10.11.1.14
10.11.1.2 is 3750 (core)
Jon#sh ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is 10.11.1.2 to network 0.0.0.0
S* 0.0.0.0/0 [0/0] via 10.11.1.2
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.11.1.0/24 is directly connected, Vlan1
L 10.11.1.14/32 is directly connected, Vlan1
Jon#sh int port-chan 11
Port-channel11 is up, line protocol is up (connected)
Hardware is EtherChannel, address is bc67.1c2c.8f31 (bia bc67.1c2c.8f31)
MTU 1500 bytes, BW 2000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 44/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is
input flow-control is off, output flow-control is unsupported
Members in this channel: Gi1/1/1 Gi2/1/1
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 1/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 346438000 bits/sec, 60724 packets/sec
5 minute output rate 219000 bits/sec, 393 packets/sec
1035330112 packets input, 736325645076 bytes, 0 no buffer
Received 364858179 broadcasts (342729785 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 342729785 multicast, 0 pause input
0 input packets with dribble condition detected
7065898 packets output, 503248621 bytes, 0 underruns
0 output errors, 0 collisions, 1 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
Jon#
Jon#sh int port-chan 11 trunk
Port Mode Encapsulation Status Native vlan
Po11 on 802.1q trunking 1
Port Vlans allowed on trunk
Po11 1-4094
Port Vlans allowed and active in management domain
Po11 1,10,41,70,72,110,112,172,192,222,310,400,410,722,999
Port Vlans in spanning tree forwarding state and not pruned
Po11 1,10,41,70,72,110,112,172,192,222,310,400,410,722,999
Jon#sh int port-chan 11 switchport
Name: Po11
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Off
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Administrative Native VLAN tagging: enabled
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk associations: none
Administrative private-vlan trunk mappings: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
Jon#
Jon#sh vlan br
VLAN Name Status Ports
1 default active Gi1/0/1, Gi1/0/2, Gi1/0/3
Gi1/0/4, Gi1/0/5, Gi1/0/6
Gi1/0/7, Gi1/0/8, Gi1/0/9
Gi1/0/10, Gi1/0/11, Gi1/0/12
Gi1/0/13, Gi1/0/14, Gi1/0/15
Gi1/0/16, Gi1/0/17, Gi1/0/18
Gi1/0/19, Gi1/0/20, Gi1/0/21
Gi1/0/22, Gi1/0/23, Gi1/0/24
Gi1/0/25, Gi1/0/26, Gi1/0/27
Gi1/0/28, Gi1/0/29, Gi1/0/30
Gi1/0/31, Gi1/0/32, Gi1/0/33
Gi1/0/34, Gi1/0/35, Gi1/0/36
Gi1/0/37, Gi1/0/38, Gi1/0/39
Gi1/0/40, Gi1/0/41, Gi1/0/42
Gi1/0/43, Gi1/0/44, Gi1/0/45
Gi1/0/46, Gi1/0/47, Gi1/0/48
Gi1/1/2, Gi1/1/3, Gi1/1/4
Gi2/0/1, Gi2/0/2, Gi2/0/3
Gi2/0/4, Gi2/0/5, Gi2/0/6
Gi2/0/7, Gi2/0/8, Gi2/0/9
Gi2/0/10, Gi2/0/11, Gi2/0/12
Gi2/0/13, Gi2/0/14, Gi2/0/15
Gi2/0/16, Gi2/0/17, Gi2/0/18
Gi2/0/19, Gi2/0/20, Gi2/0/21
Gi2/0/22, Gi2/0/23, Gi2/0/24
Gi2/0/25, Gi2/0/26, Gi2/0/27
Gi2/0/28, Gi2/0/29, Gi2/0/30
Gi2/0/31, Gi2/0/32, Gi2/0/33
Gi2/0/34, Gi2/0/35, Gi2/0/36
Gi2/0/37, Gi2/0/38, Gi2/0/39
Gi2/0/40, Gi2/0/41, Gi2/0/42
Gi2/0/43, Gi2/0/44, Gi2/0/45
Gi2/0/46, Gi2/0/47, Gi2/0/48
Gi2/1/2, Gi2/1/3, Gi2/1/4
10 VLAN0010 active
VLAN Name Status Ports
41 VLAN0041 active
70 VLAN0070 active
72 VLAN0072 active
110 VLAN0110 active
112 VLAN0112 active
172 VLAN0172 active
192 VLAN0192 active
222 VLAN0222 active
310 VLAN0310 active
400 VLAN0400 active
410 VLAN0410 active
722 VLAN0722 active
999 VLAN0999 active
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
Jon#
Jon#sh ip int br | ex un
Interface IP-Address OK? Method Status Protocol
Vlan1 10.11.1.14 YES NVRAM up up
Jon#sh int gi 1/1/1 switchport
Name: Gi1/1/1
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk (member of bundle Po11)
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Off
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Administrative Native VLAN tagging: enabled
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk associations: none
Administrative private-vlan trunk mappings: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
Jon#
Jon#sh int gi 2/1/1 switchport
Name: Gi2/1/1
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk (member of bundle Po11)
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Off
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Administrative Native VLAN tagging: enabled
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk associations: none
Administrative private-vlan trunk mappings: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
Jon#sh vtp sta
VTP Version capable : 1 to 3
VTP version running : 1
VTP Domain Name : SU4
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : 6cfa.8961.ae80
Configuration last modified by 10.11.1.3 at 5-10-96 10:46:01
Feature VLAN:
VTP Operating Mode : Client
Maximum VLANs supported locally : 1005
Number of existing VLANs : 19
Configuration Revision : 21
MD5 digest : 0x91 0x8F 0xCB 0x5F 0x70 0x43 0x35 0x72
0xD2 0xFC 0x18 0x68 0x4B 0xE9 0xED 0x86
Here is 3750 config:
garfield#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is 172.16.1.254 to network 0.0.0.0
C 192.168.40.0/24 is directly connected, Vlan192
172.16.0.0/24 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, Vlan172
C 192.168.41.0/24 is directly connected, Vlan41
10.0.0.0/24 is subnetted, 4 subnets
C 10.11.1.0 is directly connected, Vlan10
C 10.11.2.0 is directly connected, Vlan112
C 10.3.3.0 is directly connected, Vlan310
S 10.7.2.0 [1/0] via 10.11.1.57
S* 0.0.0.0/0 [1/0] via 172.16.1.254
garfield#
garfield#sh int port-chan 10
Port-channel10 is up, line protocol is up (connected)
Hardware is EtherChannel, address is 0019.e78d.cc31 (bia 0019.e78d.cc31)
MTU 1500 bytes, BW 2000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 0/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is unknown
input flow-control is off, output flow-control is unsupported
Members in this channel: Gi1/0/49 Gi2/0/49
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:10, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/0 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
22417 packets input, 2835668 bytes, 0 no buffer
Received 22275 broadcasts (22156 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 22156 multicast, 0 pause input
0 input packets with dribble condition detected
62724237 packets output, 58026872380 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
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
garfield#
garfield#sh int port-chan 10 switchport
Name: Po10
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Off
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Administrative Native VLAN tagging: enabled
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk associations: none
Administrative private-vlan trunk mappings: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
garfield#
garfield#sh int port-chan 10 trunk
Port Mode Encapsulation Status Native vlan
Po10 on 802.1q trunking 1
Port Vlans allowed on trunk
Po10 1-4094
Port Vlans allowed and active in management domain
Po10 1,10,41,70,72,110,112,172,192,222,310,400,410,722,999
Port Vlans in spanning tree forwarding state and not pruned
Po10 1,10,41,70,72,110,112,172,192,222,310,400,410,722,999
garfield#
I want to be able to use the new 3850 with all of my existing vlans.
Any suggestions appreciated. Hopefully, I can get another change window approved so I can try out any new ideas.
Thank you,
JD

802.1x between Switch 3750 and ACS 4.2 Authentication faild --need help

I configured the Switch 3750 and ACS for 802.1x authentication.
when I used the windows as the 802.1x client, it prompted "click here to enter user name and pasword for the network " as normal.
The problem is that after I entered username and password (i am sure i enter the identical username and password as in ACS) the authentication failed,
What is the most possibly problem?
Thx in advance!!!
The configuration is Sw3750 is:
aaa new-model
aaa authentication login default local
aaa authentication enable default line
aaa authentication dot1x default group radius
aaa authorization network default group radius
dot1x system-auth-control
interface GigabitEthernet1/0/18
description Link to test 802.1x
switchport access vlan 119
switchport mode access
dot1x pae authenticator
dot1x port-control auto
spanning-tree portfast
radius-server host 10.1.1.333 auth-port 1645 acct-port 1646
radius-server source-ports 1645-1646
radius-server key keepopen0
In the ACS:
Network Configuration -->aaa client ip address: 10.1.119.1(the vlan 119's ip address), shared secret: keepopen0
user setup -->real name:test1, password: test1.
Attached is the debug information

What do you see in acs failed attempts?

Comparison between 3750 and 3750-metro

hi folks,
is there any links which will provide me on the comparison between 3750 and 3750-metro? for exapmple, isis is not support on 3750 but it support on 3750-metro. The product information from cisco site is insufficient in term of the main differences :p
rgd
josh.w

Hi Josh,
The Cisco Catalyst 3750 Metro Series is built for Metro Ethernet access in a customer location, enabling the delivery of more differentiated Metro Ethernet services. These switches feature bidirectional hierarchical QoS and Traffic Shaping, intelligent 802.1Q tunneling with class-of-service (CoS) mutation, VLAN translation, MPLS, EoMPLS, and Hierarchical Virtual Private LAN Service (H-VPLS) support, and redundant AC or DC power. They are ideal for service providers seeking to deliver profitable business services, such as Layer 2, Layer 3, and MPLS VPNs, in a variety of bandwidths and with different SLAs.
The metro switches have the PXF chips (which allow hierarchical QoS on the 2 "WAN" GigE ports, so several logical links can share a connection, and have soft bandwidth limits).
For more details on 3750-M switches have a look at this link
http://www.cisco.com/en/US/products/hw/switches/ps5532/products_qanda_item09186a00801eb822.shtml
HTH
Ankur
*Pls rate all helpfull post

Interconnecting Catalyst 3750 and 2948G-L3

I am trying to interconnect a Catalyst 3750 and a 2948G-L3 using fiber GBIC. The interfaces where the GBIC and fiber are attached show up as physically down. I have tried different ports and also changed both switches. No Luck. If I connect a 3524 to the 3750 using the same connection it works.
Are 2948G-L3 switches compatible with the 3750?
Thanks,
VT

Should have no problem. Can you try the following on the 3750's gig interface:
speed nonegotiate
See of the link comes up.
Please rate all posts.

VTP Between 3750 and 2811

Hey All,
I'm attempting to create a trunk between a 3750 and a Cisco 2811 router (with a 16 port switching module NM-16-ESW). I'm using an etherchannel trunk between the two. I'm trying to configure VTP on the 3750 (server) and make the 2811 a client. Below is a copy of the configs and output from relevant commands. Any clue why I'm not seeing vlans on the 2811?
2811 Router Config:
interface Port-channel1
switchport mode trunk
nterface FastEthernet1/14
switchport mode trunk
channel-group 1 mode on
interface FastEthernet1/15
switchport mode trunk
channel-group 1 mode on
MPLS-TEST#sh vlans
No Virtual LANs configured.
MPLS-TEST#sh vtp status
VTP Version : 2
Configuration Revision : 1
Maximum VLANs supported locally : 256
Number of existing VLANs : 6
VTP Operating Mode : Client
VTP Domain Name : VTP
VTP Pruning Mode : Disabled
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
MD5 digest : 0xE7 0x0F 0xE8 0x89 0x47 0xAE 0x7E 0x7B
Configuration last modified by <IP of 3750> at 3-1-93 00:06:05
3750 Config and Shows:
interface Port-channel1
switchport trunk encapsulation dot1q
switchport mode trunk
interface FastEthernet1/0/47
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 1 mode on
interface FastEthernet1/0/48
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 1 mode on
sw-upstairs#sh vtp status
VTP Version : 2
Configuration Revision : 1
Maximum VLANs supported locally : 1005
Number of existing VLANs : 6
VTP Operating Mode : Server
VTP Domain Name : VTP
VTP Pruning Mode : Disabled
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
MD5 digest : 0xE7 0x0F 0xE8 0x89 0x47 0xAE 0x7E 0x7B
Configuration last modified by <IP of VLAN 1> at 3-1-93 00:06:05
Local updater ID is 134.178.220.224 on interface Vl1 (lowest numbered VLAN interface found)
sw-upstairs#sh vlan
VLAN Name Status Ports
1 default active Fa1/0/1, Fa1/0/2, Fa1/0/3
Fa1/0/4, Fa1/0/5, Fa1/0/6
Fa1/0/7, Fa1/0/8, Fa1/0/9
Fa1/0/10, Fa1/0/11, Fa1/0/12
Fa1/0/13, Fa1/0/14, Fa1/0/15
Fa1/0/16, Fa1/0/17, Fa1/0/18
Fa1/0/19, Fa1/0/20, Fa1/0/21
Fa1/0/22, Fa1/0/23, Fa1/0/24
Fa1/0/25, Fa1/0/26, Fa1/0/27
Fa1/0/28, Fa1/0/29, Fa1/0/30
Fa1/0/31, Fa1/0/32, Fa1/0/33
Fa1/0/34, Fa1/0/35, Fa1/0/36
Fa1/0/37, Fa1/0/38, Fa1/0/39
Fa1/0/40, Fa1/0/41, Fa1/0/42
Fa1/0/43, Fa1/0/44, Fa1/0/45
Fa1/0/46, Gi1/0/1, Gi1/0/2
Gi1/0/3, Gi1/0/4
5 INTERNET active
I'm baffled why these vlans aren't showing on my 2811. Any ideas?
Thanks,
Mike

Hey All,
Thanks for the input! I was actually able to solve the issue. It appears that "sh vlans" is different on an IOS router than an IOS switch. On the router it shows sub-interface ISL/dot1q trunks to a switch. This is obviously different for me as I have a switching card. In order to see VTP in action on the router and verify it was working I actually needed to view it through the VLAN database. See below:
MPLS-TEST#vlan database
MPLS-TEST(vlan)#show
VLAN ISL Id: 1
Name: default
Media Type: Ethernet
VLAN 802.10 Id: 100001
State: Operational
MTU: 1500
VLAN ISL Id: 5
Name: INTERNET
Media Type: Ethernet
VLAN 802.10 Id: 100005
State: Operational
MTU: 1500
VLAN ISL Id: 10
Name: INTERNET-DMZ
Media Type: Ethernet
VLAN 802.10 Id: 100010
State: Operational
MTU: 1500
VLAN ISL Id: 20
Name: PRODUCTION
Media Type: Ethernet
VLAN 802.10 Id: 100020
State: Operational
MTU: 1500
VLAN ISL Id: 25
Name: LAPTOPS
Media Type: Ethernet
VLAN 802.10 Id: 100025
State: Operational
MTU: 1500
VLAN ISL Id: 30
Name: NETWORK-DISTRIBUTION
Media Type: Ethernet
VLAN 802.10 Id: 100030
State: Operational
MTU: 1500
VLAN ISL Id: 250
Name: BGP-ROUTING
Media Type: Ethernet
VLAN 802.10 Id: 100250
Certainly is confusing and left me scratching my head. Thanks for the help though! I through this up on my blog too so someone in the future isn't chasing his/her tail
-Mike
http://cs-mars.blogspot.com

Link between 3750 and 4908 (Lx, monomode fiber)

Hello,
I have a new swtich a C3750 and a 4908 works very well.
I try to link a 3750 and a 4908, my results :
- Port of 3750 and 4908 is up when I put "speed nonegociate" . And juste few packets arrive to the 4908 and I can't ping the 4908.
- Port of 3750 is up with "speed nonegociate", and the port of 4908 stays down....
- Port of 3750 and 4908 stay down without "speed nonegociate" ... :(
You can see the 3750's config in attachments.
Ps : Sorry for my english, i'm a french student :)
Thank in advance

Hi
In recent past i had tried interfacing 3750 installed with LX SFP with third party SFPs installed in Lucent DSLAMs with speed nonegotiate on the cisco 3750 side.
We did face some kinda wierd problems after the lucent DSLAMs get rebooted or sometimes even we disconnect and reconnect the fiber it happened that we failed to get the link(connectivity).
So i would suggest to go for an original Cisco SFP make to avoid all these intermittent issues which can result in unecessary downtimes..
regds

3750 and WCCP

Hi all
We have a cisco network and in our smaller branch offices, are using 3750 L3 switches as the core. From this switch, we are running WCCP to a pair of WAE-674 WAAS appliances.
This is all working well, and redirection is occuring in hardware on the 3750 (running 12.2(52))
I think I know the answer to this question, but would like validation.
If we apply a redirect list to the WCCP statement in the 3750, and then put a deny in the corresponding ACL, will this deny statement be processed in hardware, or punted to the cpu? My feeling is processed software, but haven't found a rock solid cisco dodument to confirm.
thx in advance
Michael

Michael,
Considering you are running latest code, deny statement will be processed in Software, if ACL is large and has lot of hits, then you may see CPU issues on the switch. Thanks
Ahsan

3750 and 3550 Flapping

We have the 3750 and 3550 switches installed at our site and we are getting the following errors.
%LINK-3-UPDOWN: Interface GigabitEthernet2/0/13, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/13, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/7, changed state to down
%LINK-3-UPDOWN: Interface FastEthernet0/7, changed state to down
%LINK-3-UPDOWN: Interface FastEthernet0/7, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/7, changed state to up
%LINK-3-UPDOWN: Interface GigabitEthernet2/0/11, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/11, changed state to up
%LINK-3-UPDOWN: Interface GigabitEthernet1/0/18, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/18, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/11, changed state to down
%LINK-3-UPDOWN: Interface GigabitEthernet2/0/11, changed state to down
%LINK-3-UPDOWN: Interface GigabitEthernet2/0/11, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/11, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/18, changed state to down
What might be causing these errors and what can we do to fix them. Also is there some software out there that can tell us what might be causing the errors, ie... excessive collisions or the such
Thanks
Steve

Here is most of the configuration for the 3750, it won't allow me to post all of it
show running
Building configuration...
Current configuration : 5733 bytes
! Last configuration change at 10:02:01 UTC Fri Sep 29 2006 by enable
! NVRAM config last updated at 10:02:01 UTC Fri Sep 29 2006 by enable
version 12.2
no service pad
service timestamps debug datetime
service timestamps log datetime
service password-encryption
service sequence-numbers
hostname CLO511204
no logging console
enable secret 5 $1$FQBc$HnhMngh.vj1ShB8AclhsX0
aaa new-model
aaa authentication login default local
aaa session-id common
clock timezone UTC -7
clock summer-time UTC recurring
ip subnet-zero
ip domain-name clovisprd
ip name-server 10.17.150.1
ip name-server 10.17.150.11
vtp mode transparent
no file verify auto
spanning-tree mode pvst
no spanning-tree optimize bpdu transmission
spanning-tree extend system-id
vlan internal allocation policy ascending
vlan 150
name SWC-CONTROL
interface FastEthernet0/1
description PLC WS00-00
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
interface FastEthernet0/2
description PLC BC00-00
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
interface FastEthernet0/3
description PLC U300-00
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
interface FastEthernet0/4
description PLC P100-00
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
interface FastEthernet0/5
description PLC DRY1-00 NuCon
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
interface FastEthernet0/6
description PLC EVP1-00
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
interface FastEthernet0/7
description PLC DRY1-00
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
interface FastEthernet0/8
description PLC DRY1-10
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
interface FastEthernet0/9
description PLC DRY1-15
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
interface FastEthernet0/10
description SW PFR1-03
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
interface FastEthernet0/11
description PV+ PFR1-03 NotUse
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
interface FastEthernet0/12
description SW PFR1-02
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
interface FastEthernet0/13
description PLC PL20-01
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
interface FastEthernet0/14
description PV+ PFR1-02
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
interface FastEthernet0/15
description PLC IIC
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
interface FastEthernet0/16
description PLC angle
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
interface FastEthernet0/17
description Spare
switchport access vlan 150
switchport mode access
duplex full
spanning-tree portfast
Thanks in advance for any help you can provide

Trunk configuration (VTP) between 3750 and 2811

Hi,
I have a stack of 6 Cisco Catalyst 3750G with 6 VLANs acting as a VTP server and want to establish a trunk link to my Cisco 2811 router equiped with a switching module 16 ports. Can I set the 2811 as a VTP client to propagate the VLAN info from the 3750 and configure one of the port on the switching module of the 2811 as a trunk encapsulated DOT1q and will I be able to route to the outside world.
Thank you

I beleive the switching cards support vtp and that should be possible.
Table 2. Features Supported on Cisco EtherSwitch Modules
EtherSwitch Network Modules (NM-16ESW and NMD-36ESW)
EtherSwitch HWICs (HWIC-4ESW and HWICD-9ESW)
EtherSwitch Service Modules (NME-16ES-1G, NME-16ES-1G-P, NME-X-23ES-1G, NME-X-23ES-1G-P, NME-XD-48ES-2S-P, and NME-XD-24ES-1S-P)
VLANs
Multiple VLANs per Switch
Yes (varies by chassis; maximum of 64 on Cisco 3845)
Yes (maximum of 15 on any chassis)
Yes (maximum of 1,024 per switch or stack)
VLANs in 4,000 Range
No
No
Yes
IEEE 802.1Q Tagged and Untagged VLANs
Yes
Yes
Yes (802.1Q and Inter-Switch Link [ISL])
VLAN Trunking Protocol (VTP) Support for Client, Server, and Transparent Modes
Yes
Yes
Yes

Upgrade LIC for 5760 and 3850(L-LIC-CTIOS-1A)

Hi ,
the license part number (L-LIC-CTIOS-1A) is available from both 5760 primary upgrade LIC and 3850 Primary upgrade LIc with same prices as well
My Question is,
if i purchase L-LIC-CTIOS-1A with the primary upgrade lic as
L-LIC-CT5760-UPG
Upg license SKU for Cisco 5760 WirelessController (e-deliv)
will i be able to use it for 3850 switches as well because the primary upgrade LIC for 3850 is
L-LIC-CT3850-UPG
Upg license SKU for Cisco 3850 WirelessController (e-deliv)
Hope i am clear and if anybody has come across this suitation please reply

Found the answer
it can be transferred between 3850 and 5760 controllers
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps12686/product_bulletin_c25-720777.pdf
AP License for Cisco Catalyst 3850
There is no license required for a Cisco Catalyst 3850 to operate as a distributed termination point for Access
Points (Mobility Agent mode). The same switch can also operate in the full controller Mobility Controller (MC)
mode by adding an AP license for up to 50 Access Points. Other devices that can act as an MC are the new Cisco
Wireless Controller 5760, Cisco Wireless Controller 5508 and Cisco Wireless Services Module 2 (WiSM2)
wireless controllers. AP licenses can be transferred between two 3850 switches or between 3850 and 5760
controller.

Mixed 3750G and 3850-X stack and Netfow module compatibility

Anyone doing this?
I can seem to find any documentation regarding a mixed stack AND a netflow module.
If you have a pure 3750-X stack you can run the module in any switch - it doesn't need to be the master. But what if half the switches are 3750's and half are 3750-X's?
Can it still read the flows of the older 3750's?

Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Just wanted to mention when you mix original StackWise with StackWisePlus, StackWisePlus falls back to StackWise mode. I.e. you lose some of the "Plus" features.

8800gt and 3850/70 on a p965 neo-f?

hey guys i was gonna upgrade my video card gonna get a 8800gt or a 3850 or 3870...will these work on my mobo? coz ive heard these r long and the ide socket gets in the way, any1 else running this setup?
im using rev 1.1 bios 1.6
thnx

It will work for single and dual slot cooling solutions.
Have a read here: https://forum-en.msi.com/index.php?topic=112337.msg840312#msg840312

Ciscoworks LMS 4.0.1 and 3850 switch support

HI, I want to know if 3850 switch is supported in ciscoworks LMS 4.0.1, I added the devices, inventory collections successful but devices icon is blue with question mark "?" and config sync fails always.
I tried to download the packages to install it but I couldn't find it.
thanks fo help

Yes LMS 4.2 needs a new license. You can probably check once if your LMS 4.0.1 license allows you a free upgrade.
Many old LMS 4.0.1 were offered free Cisco Prime Infrastructure 1.x, which has LMS 4.2 available with.
You can check the contract covering your LMS 4.0 on Product upgrade tool :
http://tools.cisco.com/gct/Upgrade/jsp/productUpgrade.jsp
-Thanks
Vinod
**Rating Encourages contributors, and its really free. **

Disable Multicast MAC Addr restricted in Catalyst 3750 and C3560G

Hi All,
I'm using Cisco 3750 Catalyst and C3560G, recent days ago i purchased a pair of WatchGuard Firewalls and put in the system to run HA Active/Active model.
The requirement to run WatchGuard Firewall HA A/A model is to allow ARP request if the response contains a multicast MAC Address in Routers and Switches.
I read somewhere that Routers and layer 3 switches, the default behavior is to follow RFC 1812, which says that the routers must not believe any ARP reply that claims that the link later address of another host or router is a broadcast or multicast address.
Can you pl show me the command to Allow all Multicast MAC Address for interfaces? Or disable RFC 1812 in order to get WatchGuard Firewall works properly.
Here is the information from WatchGuard firewall: "When you configure WatchGuard FireCluster in an active/active configuration, the cluster uses multicast MAC addresses for all interfaces that send network traffic. Before you enable FireCluster, make sure your network switches, routers, and other devices are configured to route network traffic with multicast MAC addresses.
Pl help. Thanks.

Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
My experience on 3750 has been generally only a reload will clear the detailed MLS QoS stats.
However, I thought could could clear the interface stats, although, if not, might be a bug in your IOS version (you didn't note actual 3750 model or specific IOS version being used).
Lastly, the interface stats don't clear at all? Reason I ask, disabling QoS doesn't preclude you still getting drops.

3750 and 3850 stackwise

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