C2900XL, two questions

I have a Cisco C2900XL switch running the c2900XL-h2s-mz-112.8.2-SA6.bin. I have two questions regarding this switch as I am not that knowledgeable when it comes to cisco.

  1. First off is anytime I plug a serial cable from a windows box into the switch, it restarts? Prior to plugging in everything is running fine (4 machines plugged into this switch) and then nothing after plugging in the serial. So I bring up my hyperterminal and hit enter and it boots up.

  1. When I run ping commands from the boxes plugged into the cisco switch I get the following results on all boxes.

# ping google.ca PING google.ca (64.233.187.104): 56 data bytes

64 bytes from 64.233.187.104: icmp_seq=0 ttl=242 time=80.334 ms 64 bytes from 64.233.187.104: icmp_seq=1 ttl=242 time=80.341 ms 64 bytes from 64.233.187.104: icmp_seq=2 ttl=242 time=79.818 ms 64 bytes from 64.233.187.104: icmp_seq=3 ttl=242 time=80.211 ms 64 bytes from 64.233.187.104: icmp_seq=4 ttl=242 time=79.839 ms

--- google.ca ping statistics ---

5 packets transmitted, 5 packets received, 0.0% packet loss round-trip min/avg/max/std-dev = 79.818/80.108/80.341/0.388 ms # ping google.ca PING google.ca (64.233.161.104): 56 data bytes 64 bytes from 64.233.161.104: icmp_seq=0 ttl=243 time=73.455 ms 64 bytes from 64.233.161.104: icmp_seq=1 ttl=243 time=73.334 ms 64 bytes from 64.233.161.104: icmp_seq=2 ttl=243 time=73.483 ms 64 bytes from 64.233.161.104: icmp_seq=3 ttl=243 time=73.329 ms 64 bytes from 64.233.161.104: icmp_seq=4 ttl=243 time=73.612 ms

--- google.ca ping statistics ---

5 packets transmitted, 5 packets received, 0.0% packet loss round-trip min/avg/max/std-dev = 73.329/73.442/73.612/0.314 ms # ping google.ca PING google.ca (66.102.7.104): 56 data bytes 64 bytes from 66.102.7.104: icmp_seq=0 ttl=246 time=27.236 ms 64 bytes from 66.102.7.104: icmp_seq=1 ttl=246 time=27.109 ms 64 bytes from 66.102.7.104: icmp_seq=2 ttl=246 time=27.282 ms 64 bytes from 66.102.7.104: icmp_seq=3 ttl=246 time=27.091 ms 64 bytes from 66.102.7.104: icmp_seq=4 ttl=246 time=27.206 ms

--- google.ca ping statistics ---

5 packets transmitted, 5 packets received, 0.0% packet loss round-trip min/avg/max/std-dev = 27.091/27.184/27.282/0.221 ms

Every third attempt is significatly faster. Again this happens on all 4 boxes with the same results. Does cisco switches just function this way? I thought I would include the running config as it is right now. FYI this switch is the switch for all machines in the DMZ. It's plugged into a BSD firewall. I will admit my config is basic as I do not know cisco products that well.

show running-config Building configuration...

Current configuration: ! version 11.2 no service pad no service udp-small-servers no service tcp-small-servers ! hostname DMZ ! enable secret 5 blahblahblah enable password nothing (this is not my pass) ! ip subnet-zero ip name-server 192.168.200.254 (firewall/DNS) ! clock timezone MST -7 ! interface VLAN1 no ip address no ip route-cache ! interface FastEthernet0/1 - used (doing 100/full) ! interface FastEthernet0/2 - used (doing 100/full) ! interface FastEthernet0/3 - used (doing 100/full) ! interface FastEthernet0/4- used (doing 100/full) ! interface FastEthernet0/5 ! interface FastEthernet0/6 ! interface FastEthernet0/7 ! interface FastEthernet0/8 ! interface FastEthernet0/9 ! interface FastEthernet0/10 ! interface FastEthernet0/11 ! interface FastEthernet0/12 -(This goes to the firewall) keepalive 100 speed 100 duplex full ! ip default-gateway 192.168.200.254 (firewall) no logging console snmp-server community private RW snmp-server community public RO snmp-server location somewhere snmp-server contact me snmp-server chassis-id 0x0D ! line con 0 stopbits 1 line vty 0 4 password nothing login line vty 5 9 login ! end

I am sure there are ways to improve the configuration so that performance is better, but I need some direction please. This is an old switch that I would rather not have to replace.

Reply to
2821 Intergrated mess
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First, each of the three pings went to a different endpoint IP address. It is far more likely that the 66.102.7.104 host is "closer" or "faster" relative to you then the other two boxes.

Another possible explanation is that somewhere between you and "google.ca" there is a hop which actually has multiple equal cost paths, but each of the paths are loaded differenlty, resulting in different RTTs.

I doubt that the difference is due in anyway to the switch.

As far as the switch booting when you plug into it, could you capture that with hyperterm and post it? That sounds odd. Did you check that the power cable is firmly seated in the switch and the outlet?

Reply to
angry_engineer

Thanks Angry_Engineer,

Ya your right the one IP is closer to the my location (stupid on my part).

I will try to capture the reloading of the switch and post it when I do.

Thanks again!

Reply to
2821 Intergrated mess

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