I am sure this has to do with the IDB limitations of the box that you are using this PA in and an allocation issu within each of the 63 controllers "Up to 256 usable channels can be allocated among the 63 E1 ports" . You're using a 7500 here, that in recent IOS teh IDB limitation is 2048. So if this was not throttled down from NX64 not only would this PA be capable of taking all possible interface descriptors but taking more than the 7500 could handle. 256 seems like a number to make it play nice in the router as to not take more than it's share of IDB's rather than a HW limitation. Also I am sure that the Developers do not think that using this PA most customers would be provisioning many 64k circuits. Just a guess there.
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...