Cisco WS-X6416-GE-MT - Interface Module - Expansion Uživatelský manuál stáhnout pdf (Strana 43)

White Paper

Cisco Catalyst OS Cisco IOS Software

Not Applicable IOS(config)# monitor session 3 type erspan-source

IOS(config-mon-erspan-src)# source interface gigabitethernet 4/1

IOS(config-mon-erspan-src)# destination

IOS(config-mon-erspan-src-dst)# ip address 10.1.1.1

IOS(config-mon-erspan-src-dst)# origin ip address 10.10.1.1

IOS(config-mon-erspan-src-dst)# erspan-id 101

Jumbo Frames

The jumbo frame feature supports a single larger-than-default Ethernet MTU size (1500 bytes) on

the switch. The MTU can be configured between 1500 to 10,240 bytes with default (recommended)

MTU of 9216 bytes. Jumbo frames are switched in hardware with no performance impact for

Ethernet, Fast Ethernet, Gigabit Ethernet, and 10 Gigabit Ethernet interfaces. These interfaces can

be routed interfaces, access switchports, trunk switchports, or EtherChannel groups (observe any

restrictions imposed by the neighboring device). Jumbo frames are supported on VLAN interfaces

(SVIs), but this would only be applicable for software switched traffic. As a general rule (not OS

specific), jumbo frames should be enabled on all or none of the ports in a particular VLAN.

The configurations below show the jumbo frame configuration in both the Cisco Catalyst OS and

Cisco IOS Software.

Cisco Catalyst OS Cisco IOS Software

Set port jumbo gi1/1-2 enable

Show port jumbo (to show)

int range gi1/1—2

mtu 9216

show interface gi1/1 (to show)

The above commands enable MTU 9216 bytes on the gigabit interfaces. This will automatically

change the ip mtu size also. The reverse is not true. Increasing ip mtu 9216 does not increase the

interface MTU size.

High Availability

High availability on the Cisco Catalyst 6500 is one of the primary differentiators of the platform,

allowing for fault avoidance and maximum uptime. With features like Nonstop Forwarding (NSF)

and Stateful Switchover (SSO) combined with Generic Online Diagnostics (GOLD), the Cisco

Catalyst 6500 can maintain packet processing combined with intersystem fault detection giving

superior reliability and uptime.

Generic Online Diagnostics

The GOLD implementation checks the health of hardware components and verifies proper

operation of the system data and control planes. Some tests take effect when the system is

booting up, whereas other tests take effect when the system is operational. As shown in Figure 10,

tests are categorized into two categories: boot-up diagnostics and runtime diagnostics. Multiple

tests can run in parallel.

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Cisco WS-X6416-GE-MT - Interface Module - Expansion Uživatelský manuál Strana 43