Cisco WS-X6708-10G-3CXL= - 10 Gigabit Ethernet Module Manual de usuario descargar pdf (Pagina 44)

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This link failure causes the RBH values to be redistributed among the remaining multichassis Cisco EtherChannel link

ports in the local chassis that is the same as a link failure in a standard Cisco EtherChannel link using a standalone

Cisco Catalyst 6500. The endpoint (host, switch, router, and so on) on the other end of the multichassis Cisco

EtherChannel link detects the link failure and adjusts its load-balancing algorithms to avoid the failed link.

Availability is not affected for those data flows that do not use the failed link. For those traffic flows that do us e the

failed link, the effect consists of the time it takes to detect the link failure and reprogram the indices within the system,

estimated to be approximately 50 to 200 ms. You can achieve faster convergence time by using the adaptive Cisco

EtherChannel load-balancing algorithm.

All Links to a Single Chassis Within the Multichassis Cisco EtherChannel Link Fail

When all of the links connecting to a single chassis that is part of the same multichassis Cisco EtherChannel link fail,

the port bundle is converted from a multichassis Cisco EtherChannel link to a standard Cisco EtherChannel link and

is treated as a single-homed port. The links connecting to the peer chassis remain functional. From this point onward,

all traffic from the failed link chassis destined for the Cisco EtherChannel link are sent to the remote chassis through

the VSL (Figure 31).

Figure 31.

The control protocols managing the Cisco EtherChannel link (PAgP or LACP) continue to originate from the active

supervisor engine and are sent out of the standby virtual switch ports through the VSL. The endpoint (host, switch,

router, and so on) on the other end of the multichassis Cisco EtherChannel link detects the link failure and adjusts its

load-balancing algorithms to avoid the failed link.

Availability is not affected for those data flows that do not use the failed link. For those traffic flows that do use the

failed link, the effect consists of the time it takes to detect the link failure and reprogram the indices within the system.

Active Virtual Switch Chassis Failure

The failure of the active virtual switch chassis is handled and detected in the same manner as the failure of the active

supervisor engine (Figure 32).

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Cisco WS-X6708-10G-3CXL= - 10 Gigabit Ethernet Module Manual de usuario Pagina 44