QoS and multilayer service support. A Supervisor Engine I provides only a single receive with two transmit queues. The Supervisor Engine IA, in contrast, provides two receive and three transmit queues. One queue for both received and transmitted traffic is reserved for strict, high-priority traffic, while the remaining queue(s) each support four Weighted Random Early Detection (WRED) drop thresholds for congestion avoidance.
Furthermore, the Supervisor Engine IA supports Weighted Round Robin (WRR) queue scheduling between the two flexible transmit queues that
support WRED, for fair bandwidth allocation between each queue.
It also supports the policy feature card (PFC) and the multilayer switch feature card (MSFC).
From a layer 2 standpoint, both the sup1 and sup1a will have the same performance.
[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...