November 2006
Intermediate to advanced
584 pages
14h
English
book
SAN Multiprotocol Routing: An Introduction and Implementation
by Jon Tate, Steve Fodor, Jure Arzensek
Content preview from SAN Multiprotocol Routing: An Introduction and Implementation
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Chapter 7. Cisco family routing products 245
Provide high availability on an ISL
If one link fails, traffic previously carried on this link is switched to the
remaining links. If a link goes down in a PortChannel, the upper protocol is not
aware of it. To the upper protocol, the link is still there, although the bandwidth
is diminished. The routing tables are not affected by a link failure.
Figure 7-25 shows ISLs and PortChanneling.
Figure 7-25 PortChannels and ISLs on the Cisco MDS 9000 switches
7.4.6 Trunking
The Cisco MDS 9000 Family uses the term trunking to refer to an ISL that carries
one or more VSANs. Trunking ports receive and transmit ...
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