RARP Server for Catalyst 2950 Switch

Is there a RARP Server capability for the Cisco Catalyst 2950 Switch? I know that Cisco Routers support an "ip rarp-server" command. Do Cisco Switches support RARP?

To the best of my knowledge, the RARP protocol is working with cisco 2950 switch and also it supports in most of the cisco products.
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a00800f0804.shtml

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Catalyst 2950 switch

Hello,
I am using a catalyst 2950 switch and connecting machines which have the operating system as TRU64 UNIX 5.1B (HP make DS25 servers) and WINDOWS XP Professional. The WINDOWS machines are getting connected on the network ( I am able to PING each other), but the UNIX machines are not getting connected on the network. The port LED on the switch is normal (GREEN). The netstat -r command on the UNIX machine shows default as defgw (/etc/routes) and the IP of defgw is defined in the /etc/hosts file. But there is actually no such gateway.
Please help me to get the UNIX machines connected on the network.
Thank You very Much
Best Regards
S R Vijayan

I wonder if the Windows machines are configured to use DHCP? If they are configured for DHCP and there is a DHCP server that is reachable, then it explains why the Windows machines have reachability to each other. If there is not a DHCP server available then the Windows machines are probably taking addresses in 169.254 (which is the default for Windows when it can not acquire from DHCP). This would also explain the ability of Windows machines to communicate with each other. Can the original poster clarify what IP addresses the Windows machines are using?
Then the question becomes how are the Unix machines configured? Are they supposed to use DHCP? Is so is the DHCP server reachable? If not how is the interface on the Unix box configured?
I also think that the suggestion about verifying whether the switch is configured with more than one VLAN is an excellent suggestion.
HTH
Rick

Catalyst 2950 Switch flash_init error

Hi Everyone,
I'm new to Cisco products and have a small home lab set up. I have a Catalyst 2950 switch that I would like to restore to factory defaults. Here is the issue I'm having and can't figure out.
I pull the power, telnet into the console port, hold the mode button and restore power. The boot loader (Version 12.1(11r) starts and says the usual message the system was interrupted prior to flash initialization (Paraphrasing here)
I get to the switch: command line, enter flash_init. Flash states it initialized and then all I get is a < with an underscore under it prompt. Anything I try to type comes up as bizarre characters and I can not get back to a switch: prompt unless I reboot the switch manually. Unsure of what to do here.
Thanks in advance!
-Matt
Telnet session:
C2950 Boot Loader (C2950-HBOOT-M) Version 12.1(11r)EA1, RELEASE SOFTWARE (fc1)
Compiled Mon 22-Jul-02 18:57 by antonino
WS-C2950T-24 starting...
Base ethernet MAC Address: 00:06:52:bb:c9:40
Xmodem file system is available.
The system has been interrupted prior to initializing the
flash filesystem. The following commands will initialize
the flash filesystem, and finish loading the operating
system software:
flash_init
load_helper
boot
switch: flash_init
Initializing Flash...
flashfs[0]: 4 files, 2 directories
flashfs[0]: 0 orphaned files, 0 orphaned directories
flashfs[0]: Total bytes: 7741440
flashfs[0]: Bytes used: 3726848
flashfs[0]: Bytes available: 4014592
flashfs[0]: flashfs fsck took 7 seconds.
...done initializing flash.
Boot Sector Filesystem (bs:) installed, fsid: 3
Parameter Block Filesystem (pb:) installed, fsid: 4
õíííííí <---These characters appear no matter what keys I hit.

Hi mattymattlynch
Check the workaround on the following documents:
http://www.cisco.com/c/en/us/support/docs/switches/catalyst-2950-series-switches/41845-192.html
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2950/software/release/12-1_22_ea11x/configuration/guide/scg/swtrbl.html
If no luck , the flash might be corrupted and requires a replacement.
Hope this helps
-Randy-

SNMP on Catalyst 2950 switch - possible?

How can I add SNMP to my Catalyst 2950 switch? and what will this give me with regards to network monitoring etc. A lot of my networks go through this device and I what to get stats on port etc. I really hope you can help here.

Hi Chandru,
Here's what you should do. Firstly, go to the following site which will give you a list of MIBs supported on the 2950:
http://www.cisco.com/en/US/products/hw/switches/ps628/products_configuration_guide_chapter09186a00800d84cc.html
Then, open up the Cisco SNMP Object Navigator at:
http://tools.cisco.com/Support/SNMP/do/BrowseOID.do?local=en
Within that, click on 'View and Download MIBs' and then select the MIBs you are interested in to download/view them.
As an example, you can get counters on memory pools from the CISCO-MEMORY-POOL-MIB
Hope that helps - pls rate the post if it does.
Regards,
Paresh.

DHCP on Cisco Catalyst 2950 Switch

Hello
I need to configure my cisco catalyst 2950 series switch in order to act as DHCP server for devices connected to its ports.
Please say me, how to do that ?
Thank you
Narek

Please find the sample DHCP configuration for one of the VLANs.
Interface Vlan1
description Cisco DHCP
ip address 10.10.2.1 255.255.255.0
ip dhcp pool cisco
network 10.10.2.0 255.255.255.0
default-router 10.10.2.1
domain-name mydomain.com
dns-server 10.10.2.10
netbios-name-server 10.10.2.15
lease 7
A 24 hour lease is the default if left out and the netbios-name-server is WINS in the Windows world.
If you want to use DHCP server for other VLANs as well create similar DHCP pools and assign the DG to the corresponding VLAN interface IP.
HTH, rate if it does
Narayan

AAA with Catalyst 2950 switch

I have a Cisco ACS 4.2 running on Windows 2003. Authentication is working fine for various cisco devices like routers, VPN concentrator etc.
Today I added a 48 port L2 switch as a AAA client, the authentication works fine. However I see many failed login attempts from this L2 switch with the user "C"
Message-Type: Authen failed
Caller-ID: async
Authen-Failure-Code: External DB user invalid or bad password
NAS-Port: tty0
What is causing this failed login?

If the console port on the switch generating the spurious login errors is connected to a device offering remote access to the console port, then it's likely that some output from this device is causing the bogus login attempt.
If this device is an IOS router with a bunch of asynch ports add "no exec" to the line connected to the switch console port.

No icmp reply from my catalyst 2950 switch

My switches is still operating but when i ping the switch, there isn't any reply. Expert please advice.

David
There are several things that might produce the symptoms that you describe. Without some more details it is difficult to know which one it might be. Some of the possibilities include:
- the switches may not have an IP address assigned. The switch will still do an excellent job of forwarding frames at layer 2, but without an IP address it can not respond to ping.
- the switch may have an IP address but there is some error in configuration of the address (perhaps a misconfigured mask, or a keying error in the address). This would not impact the switch ability to function at layer 2 but would not allow it to respond to ping etc.
- the switch may not be configured with a default gateway (or configured with an error about the default gateway). This would allow the switch to respond at layer 3 within its own subnet but not able to respond to anything outside its subnet.
- the switch may have its IP address assigned for management purposes, but the address may be associated with a VLAN which has no active ports and therefore is inactive and can not respond.
- there might be an access list assigned somewhere that is not permitting the ping.
There could be some other things. If you can provide some more details, like what kind of switches are we talking about, and some details of how the switches are configured we may be able to find better answers.
HTH
Rick

Catalyst 2950 / ip dhcp-server

Hello,
who can explain the use of ip dhcp-server on Catalyst 2950?
cat2950-03(config)#ip dhcp-server ?
Hostname or A.B.C.D IP address or Name of DHCP server
The "Catalyst 2950 and 2955 Cisco IOS Commands":
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/12122ea2/2950cr/2950cr.pdf
does not list that command.
Is it the same as "ip helper-address xxx.xxx.xxx.xxx" without forwarding the other protocols like dns, netbios, and so in or does it configure the ios dhcp-server ( that should not be included on cat2950 - as far as I know)
Greetings from Germany
Sven

Looks like it configures a remote DHCP server.
cat2950-03(config)#ip dhcp-server ?
Hostname or A.B.C.D IP address or Name of DHCP server
So, say you have a DHCP server address of 10.34.1.1, the command would be
cat2950-03(config)#ip dhcp-server 10.34.1.1
That way the hosts on the switch will now where to send the requests for an IP address. Kinda like a Gateway address.
Just my thoughts, Please rate if this helps
Scott

Catalyst 2950 trouble

I have been trying to get a Catalyst 2950 switch to work for over a week now. I received the switches with no box or packaging and I was told that there were no previous setup attempts on it. I tried performing the express setup but the lights on the server don't seem to behave the way the instructions explain. I also was never able to make a connection between the linux server I am trying to use to configure the switch and the switch. All i received was the switch and nothing else. I have an AC power cord and I also found an RJ45 - DB 9 adapter if needed. I have looked through alot of the manuals on the cisco main pages and nothing seems to be working or clicking. Please help!

Results of pinging from switch to linux box and switch to switch were both 0%.
Switch2>show arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.1.10 - 000a.8a7a.f280 ARPA Vlan1
No luck pinging switch from linux box again...
Arp -a Results
c358-hsrp102.xxxxx.com (xxx.xxx.102.1) at 00:00:0C:07:xx:xx [ether] on eth0
Route -n Results
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
xxx.xxx.102.0 0.0.0.0 255.255.254.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1
0.0.0.0 148.174.102.1 0.0.0.0 UG 0 0 0 eth0
Ifconfig results
eth0 Link encap:Ethernet HWaddr 00:13:72:FD:xx:xx
inet addr:xxx.xxx.102.78 Bcast:148.174.103.255 Mask:255.255.254.0
inet6 addr: fe80::213:72ff:fefd:871d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:38172 errors:0 dropped:0 overruns:0 frame:0
TX packets:16406 errors:0 dropped:0 overruns:0 carrier:0
collisions:224 txqueuelen:1000
RX bytes:8127476 (7.7 MiB) TX bytes:3941903 (3.7 MiB)
Interrupt:169
eth1 Link encap:Ethernet HWaddr 00:13:72:FD:87:1E
inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::213:72ff:fefd:871e/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:225
eth2 Link encap:Ethernet HWaddr 00:04:23:CD:B5:6A
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Base address:0xecc0 Memory:fe9e0000-fea00000
eth3 Link encap:Ethernet HWaddr 00:04:23:CD:B5:6B
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Base address:0xec80 Memory:fe9c0000-fe9e0000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:6376 errors:0 dropped:0 overruns:0 frame:0
TX packets:6376 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:4647441 (4.4 MiB) TX bytes:4647441 (4.4 MiB)
sit0 Link encap:IPv6-in-IPv4
NOARP MTU:1480 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Lot of info there you are only allowed 3 attachments thats why i put it all in here and attached the last 2 hope you can find everything ok.

Catalyst 2950 shuts down

I have a Catalyst 2950 switch that will run for a little while and then power down.
The fan is functional, no sounds or slow RPMs. Seems to be operating fine and the unit doesn't feel warm.
I have to unplug it for a few minutes and then plug it back in to turn it back on.
Then it will repeat the process after awhile.
Any thoughts on this?
Thanks kindly,

You have some kind of heat related failure or the power supply. Replace it ...

Cluster Management Software on Catalyst 2950

Hi There,
I was wondering if anyone would be kind enough to provide me with some help on getting the CMS software running on a Cisco Catalyst 2950 Switch. I have followed all the instructions I could find on getting the software to load from the Switch, but it will not load. Can anyone help me?
Thank you in advance.
John Grikes
[email protected]

You can start from: http://www.cisco.com/warp/public/473/59.html

IP Accounting on catalyst 2950

Hi all,
Is there a way to find out traffic information from source IP to destination IP, like ip accounting used on routers, on the catalyst 2950 switch. My switch has the standard image.
Also what performance impact would it have on the switch, if possible to implement.
Thanks,
George

Hi dukenukem,
no there is no way of interpreting flow information that way on a c2950. A c2950 is a L2 Device. Normally it doesn't really care about ip adresses.
Regards,
Sebastian

Catalyst 2950 bandwidth limitation

Hello,
please, can anyone tell me if it is possible to limit bandwidth on Catalyst 2950 switch on per VLAN basis.
Thanks in advance.
Maxime Frolov

Hello Amit,
I'll try to clarify my problem. I have a 2950 (Standard Image) with a giga uplink to a 6500. On the 2950 I have a VLAN composed of 4 ports. I' like to limit the use of the uplink link of this VLAN or at least of one port to 20%. Would it be possible on 2950 SI or I'll have to upgrade to EI whitch implyes hardware changes ? Or it just impossible on 2950 and I'll have to migrate to 3750 ?
Regards.
Maxime Frolov

VLan setup for a 2950 and 2611

Im trying to setup a real basic VLan setup for 1 2950 switch. I would like to have 3 Vlans on it including the default Vlan. So my understanding is that for all 3 of the VLans to talk to each other I will need a router to be the layer 3 device that routes the Vlans.
On my 2611 it looks like this:
interface Ethernet0/0
no ip address
full-duplex
interface Ethernet0/0.1
encapsulation dot1Q 1 native
ip address 172.16.10.1 255.255.255.0
no snmp trap link-status
interface Ethernet0/0.2
encapsulation dot1Q 2
ip address 172.16.20.1 255.255.255.0
no snmp trap link-status
interface Ethernet0/0.3
encapsulation dot1Q 3
ip address 172.16.30.1 255.255.255.0
no snmp trap link-status
Then my 2950 looks like this:
interface FastEthernet0/1
description Connection to router
switchport mode trunk
speed 10
duplex full
interface FastEthernet0/2
switchport access vlan 2
interface FastEthernet0/3
switchport access vlan 3
interface Vlan1
ip address 172.16.10.2 255.255.255.0
no ip route-cache
ip default-gateway 172.16.10.1
Ok so as it currently stands the switch and router will not talk to each other at all. From the switch I can not ping the router and vice a versa. If I plug a laptop into one of the ports using VLan1 I can ping the switch IP 172.16.10.2 but obviously can not ping the default gateway which is the router...
I didnt think this looked very hard but for some reason it does not want to work for me at all...
Any ideas?
LR

I have two things you might try. First set your trunking interface on your switch to auto.
interface fastethernet 0/1
speed auto
duplex auto
This will help to make sure that the ethernet on the 2611 will negotiate the duplex with the switch. I've had issues with 2611's trying to do full duplex on there ethernet ports.
Another Option turn on CDP on your router and switch and do a show cdp neighbor to make sure there plugged into the right ports.
Three you could move the vlan 1 ip address on the 2611 to the main interface. Example below. Then try pinging the switch. Your other tagged vlans should still work at that point. Also if you have multiple switches make sure to setup Vlan Trunk Protocol see NOTE A.
no interface Ethernet0/0.1
no encapsulation dot1Q 1 native
no ip address 172.16.10.1 255.255.255.0
no snmp trap link-status
interface Ethernet0/0
ip address 172.16.10.1 255.255.255.0
NOTE A
Add the following commands to each switch to setup your Vlan Trunk Protocol. These are pretty much the minimum amount of commands you can use to setup VTP.
vtp domain CISCO1
vtp version 2

Router "snmp-server contact" command for catalyst switches??

From the router you can configure the "snmp-server contact <text>" command
to set the system contact for SNMP. Is there any equivalent command for
Catalyst switches? I know that there's a "set system contact" command for
CatOS but i'm sure if it has something to do with SNMP.
Thanks in advance.

Yes, set system contact on switch is the same that on the router for the above command. Once you use this this command to enter the contact info, it can be polled via the SNMP MIB Object sysContact (.1.3.6.1.2.1.1.4) from RFC1213-MIB. Example, if I use 'set system contact foo', I see the following using the 'show system' output:
System Name System Location System Contact CC
foo
Polling the above via the above MIB object on the switch:
% snmpwalk .1.3.6.1.2.1.1.4
system.sysContact.0 = foo
Similarly, if you set the 'System Name' on the switch using the command 'set system name ', can be polled via sysName (.1.3.6.1.2.1.1.5) from RFC1213-MIB
Lastly, 'set system location ', once set can be polled via sysLocation (.1.3.6.1.2.1.1.6) from RFC1213-MIB

RARP Server for Catalyst 2950 Switch

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