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I have the following config. set up for an MPLS network on my CISCO 878:

 Current configuration : 941 bytes ! version 12.4 no service pad service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname MyHost ! boot-start-marker boot-end-marker ! ! no aaa new-model ! resource policy ! ip subnet-zero ip cef ! ! ! ! ! ! ! controller DSL 0 mode atm line-term cpe line-mode 2-wire line-zero dsl-mode shdsl symmetric annex B line-rate auto ! ! ! ! interface BRI0 no ip address encapsulation hdlc shutdown ! interface ATM0 ip address 10.120.240.152 255.255.255.252 no atm ilmi-keepalive pvc 0/95 cbr 2048 ! ! interface FastEthernet0 ! interface FastEthernet1 ! interface FastEthernet2 ! interface FastEthernet3 ! interface Vlan1 ip address 10.22.33.1 255.255.255.0 ! ip classless ip route 0.0.0.0 0.0.0.0 10.120.240.151 ! no ip http server no ip http secure-server ! ! control-plane ! ! line con 0 no modem enable line aux 0 line vty 0 4 login ! scheduler max-task-time 5000 end 

Now, the only problem that I had setting those parameters was PVC. I'm supposed to set:

 pvc 42/95 

But it doesn't accept! Please have a look at this configuration to see where I have gone wrong. When I use the help, it says VPI can't be more than 35. I used pvc 0/95, but it doesn't work when I install the router.

1 Answer 1

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You can show the maximum supported PVC's for a device by checking the output of show atm interface ATM0. I suspect you will be limited to 4 VC's with a maxiumum of 1024 VCI's per VPI. If this is the case, your hardware doesn't support the maximum 8 bit VPI ATM header that would allow for a maximum VPI of 255.

This is going to be a hardware limitation of the ATM Controller itself. You can confirm this by checking your hardware against https://www.cisco.com/c/en/us/support/docs/asynchronous-transfer-mode-atm/permanent-virtual-circuits-pvc-switched-virtual-circuits-svc/24871-maxvp-vc-3-24871.html

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