Quick help: Cisco 877 on Zen with multiple WAN IP

Soldato
Joined
18 Oct 2002
Posts
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Location
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I've just upgraded from a cisco 837 to an 877. I've got a /31 range as I'm with Zen, but for some reason whilst I could nat on different ip addresses in my subnet with the 837, I can't with the 877. Here's what I get on a sh int d1:

Code:
Dialer1 is up, line protocol is up (spoofing)
  Hardware is Unknown
  Internet address is 88.ooo.pop.yay/32
  MTU 1500 bytes, BW 56 Kbit/sec, DLY 20000 usec,
     reliability 255/255, txload 55/255, rxload 91/255
  Encapsulation PPP, loopback not set
  Keepalive set (10 sec)
  DTR is pulsed for 1 seconds on reset
  Interface is bound to Vi2
  Last input never, output never, output hang never
  Last clearing of "show interface" counters 13:40:54
  Input queue: 0/224/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops)
     Conversations  0/0/16 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 42 kilobits/sec
  5 minute input rate 20000 bits/sec, 1 packets/sec
  5 minute output rate 122000 bits/sec, 2 packets/sec
     500222 packets input, 236968386 bytes
     639862 packets output, 573086573 bytes

As you can see, it's picked up the ip as a /32, and not the subnet, so I'm guessing that packets to the other ip addresses aren't getting through.

Annoyingly, I can't plug my 837 back in to re-look at the config to find any differences. Anyone got any ideas?

sh run int d1:
Code:
interface Dialer1
 ip address negotiated
 ip access-group INTERNET-IN in
 ip nat outside
 ip virtual-reassembly
 encapsulation ppp
 dialer pool 1
 dialer-group 1
 no cdp enable
 ppp authentication chap pap callin
 ppp chap hostname hostname
 ppp chap password 7 *****************
 ppp ipcp dns request
 ppp ipcp wins request
 hold-queue 224 in
end
 
My Di1 gets [Zen router IP]/32, and my /29 works fine.

Edit: I should have added, my Di1 config is pretty much identical to yours.
 
Hmmmmmm. I'll take a look at debugging the NAT then to see what's going wrong.

*edit* I did a stupid thing. Didn't reset the default routes for the hosts behind the nat. Hence seemingly no connectivity to them. Doh.
 
Last edited:
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