Yes, there must be a link between them so that the two devices may send HSRP hellos (multicast traffic to destination 184.108.40.206 on udp port 1985) between them, and also so that it can route your traffic. The link can be a trunk, etherchannel, or a single vlan link. As long as traffic from the subnet that HSRP runs on is able to cross the link, you are fine. Etherchannel increases stability in case the single link fails though. It doesn't have to be vlan 1, it can be any vlan number that the HSRP group subnet is on.
[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...