I have a DSL link attached to my 2600 router through a DSL modem. I have an isdn bri line on 2600 too which is supp to be used as backup line. The DSL connection is to internet. While the ISDN line terminates at a 3600. The 3600 has a connection to internet using a leased line. The DSL modem is attached to the 2600 fast ethernet port. Between the 2600 and the DSL modem is a PIX. There is no routing protocol running between the 2600 and 3600...If DSL link fails, i want the ISDN to come up (backup link). The only route on the 2600 is a default route pointing to the inside interface of the PIX. So there is no way that the router will know if the DSL link has gone down. Can any expert suggest, some method of working around with this issue, taking into consideration,
This issue has come up here and in other forums before. A Cisco TAC CCIE weighed in several months ago and at that time I think "watched routes" was the only alternative. But I do seem to recall that he mentioned a feature that was in the works. Don't know if it ever was released or if it would require a routing protocol. Might want to open a TAC case if they don't pop in on this thread. Let us know if you do.
[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...