Weird problem in Dynamips IOS 3640.

Very weird problem with my lab here..

# VLAN Lab
autostart = False
model = 3640

[localhost]

3640
image = \Dynamips\IOS\C3640-IK.bin
ram = 128
#idlepc = 0x6062e700

ROUTER SW1
slot1 = NM-16ESW
SW1 F1/0 = SW2 F1/0
idlepc = 0x6063f6c8
model = 3640

ROUTER SW2
slot1 = NM-16ESW
idlepc = 0x605c9cf8
model = 3640

SW2#sh cdp neigh
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater

Device ID Local Intrfce Holdtme Capability Platform Port ID
SW2#

SW2#sh int f1/0
FastEthernet1/0 is up, line protocol is down
Hardware is Fast Ethernet, address is cc01.0f5c.f100 (bia cc01.0f5c.f100)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set

SW1#sh int f1/0
FastEthernet1/0 is up, line protocol is down
Hardware is Fast Ethernet, address is cc00.0f5c.f100 (bia cc00.0f5c.f100)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Auto-duplex, Auto-speed

SW1#sh cdp nei
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater

Device ID Local Intrfce Holdtme Capability Platform Port ID
SW1#

Any ideas???

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Comments

Grym

Do you have the interfaces in the same VLan

say with switchport access vlan X

Here's a config for multiple vlans but it should help in getting your "switches" setup:

http://7200emu.hacki.at/viewtopic.php?t=1990

NetworkGod

yes, they're in the same vlan (vlan 1 native)
and i don't see how vlan could relate to CDP..
CDP is enabled on both switching modules

Grym

Well i was thinking that because both the interfaces are down from your show int, "physically" you have a cable going from one to the other but for some reason the interface is still down.

Yea sorry, haven't played that much with the NM-16ESW, when I get to work today I'll fire up your config and see if I get the same results.

Paul Boz

Grym, the interfaces are up, they're just not synchronized. it doesn't matter though, because CDP rides on layer 2, so just so long as there's a physical connection it works.

Grym

Ok, so here is the setup I used:

###############
[[ROUTER SW1]]
###############
console = 2004
disk0 = 0
disk1 = 0
model = 3640
confreg = 0x2102
ram = 96
mmap = False
slot1 = NM-16ESW
F1/0 = SW2 F1/0
#f1/2 = R2 E0/0
#f1/11 = SW2 f1/11
#f1/12 = SW2 f1/12
#f1/13 = SW2 f1/13

###############
[[ROUTER SW2]]
###############
console = 2005
disk0 = 0
disk1 = 0
model = 3640
confreg = 0x2102
ram = 96
mmap = False
slot1 = NM-16ESW
#f1/3 = R3 E0/0

The only change I made is I took out the SW1 on switch 1, as it gave me an error when I started Dynagen.

SW1#show cdp neigh
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
                  S - Switch, H - Host, I - IGMP, r - Repeater

Device ID        Local Intrfce     Holdtme    Capability  Platform  Port ID
Router           Fas 1/0            35         R S I      3640      Fas 1/0
SW2              Fas 1/0            155        R S I      3640      Fas 1/0
SW1#

SW2#show cdp neigh
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
                  S - Switch, H - Host, I - IGMP, r - Repeater

Device ID        Local Intrfce     Holdtme    Capability  Platform  Port ID
Router           Fas 1/0            0          R S I      3640      Fas 1/0
SW1              Fas 1/0            173        R S I      3640      Fas 1/0
SW2#

SW2#show int f1/0
FastEthernet1/0 is up, line protocol is up
  Hardware is Fast Ethernet, address is cc06.0d1c.f100 (bia cc06.0d1c.f100)
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s

SW1#show int f1/0
FastEthernet1/0 is up, line protocol is up
  Hardware is Fast Ethernet, address is cc05.0d1c.f100 (bia cc05.0d1c.f100)
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)

So I just made the one change to your setup and everything seems to working as it should.

Grym

Paul Boz wrote:

Grym, the interfaces are up, they're just not synchronized. it doesn't matter though, because CDP rides on layer 2, so just so long as there's a physical connection it works.

Ahh, ok, so even if the int says UP/DOWN it should see the other switch in show CDP neigh, good to know for troubleshooting.

Thanks Paul

NetworkGod

Hm, do you mind telling me what particular 3640 image did you use?

maybe dynamips is bugging out with my image?
I should try another one...

Grym

C3640-jk9o3s-mz.123-14.T7.bin

I do extract the image first, which should not really matter other then for loading time.

One other thing that I did not mention is that I did no other config to the ports to get it running...

NetworkGod

HA! Would you believe this?

It did not work, until i took your config word to word and pasted it to mine.

Now it works, i'm happy.

Grym

Cool, glad to hear it, have fun with your new switches