Cisco OL-4015-08 Manual do Utilizador descarregar pdf (Página 554)

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Cross-Platform Release Notes for Cisco IOS Release 12.0S

OL-1617-14 Rev. Q0

Caveats

Resolved Caveats—Cisco IOS Release 12.0(30)S4

Conditions: This symptom is observed on a Cisco 12000 series that functions in a MVPN VRF-Lite

environment with 20 multicast streams that have a single sustained cell rate (SCR) and that have the

pps rate evenly distributed across all streams.

Workaround: There is no workaround.

• CSCei15701

Symptoms: The active PRP pauses indefinitely after it changes from standby to active.

Conditions: This symptom is observed when the redundant PRPs are configured for RPR+ mode,

the router has two APS-protected CHOC12 line cards, the router has mVPNs configured, and the

router runs Cisco IOS Release 12.0(28)S3.

Workaround: There is no workaround.

• CSCei19563

Symptoms: A faulty PRE may unexpectedly switch from standby mode to active mode, causing the

active PRE to crash.

Conditions: This symptom is observed on a Cisco 10000 series that has dual PREs and that runs

Cisco IOS Release 12.0(25)SX6 but may also occur in Release 12.0S.

Workaround: Remove the faulty PRE.

• CSCei22697

Symptoms: Some MVPN tunnels are mapped to an incorrect VRF forwarding table.

Conditions: This symptom is observed on a Cisco router that is configured for data MDT groups.

Workaround: There is no workaround.

• CSCei35132

Symptoms: When a link failure occurs between two provider (P) routers, the LSP that is protected

via Fast Reroute (FRR) for a primary tunnel and the directed LDP session within the tunnel are

fast-rerouted onto an assigned backup tunnel. However, when the backup tunnel goes down, VPN

prefixes that are protected by backup TE LSP entries in the LFIB become “Untagged.” This situation

causes packet loss for AToM and L3VPN traffic that uses the link between the P routers as its

primary path.

Conditions: These symptoms are observed on a Cisco 12000 series that runs Cisco IOS

Release 12.0(31)S, that functions as a P router, and that is connected to another P router via a 4-port

OC-3 ISE line card.

The topology is as follows:

PE ------ P --- OC-3 --- P ------ PE

There are one-hop primary tunnels between every pair of routers that is listed above, and each link

is protected by an NHOP backup tunnel LSP.

The symptom occurs when you pull the TX fiber cable from the 4-port OC-3 ISE line card that forms

the protected link between the two P routers, when the protected LSP is fast-rerouted onto the

backup tunnel, and when the backup tunnel is torn down. One P router may show “Untagged” entries

in its LFIB, especially for a loopback interface to a provider edge (PE) router. This situation breaks

the forwarding for all of the L2 and L3 VPNs that depend on that PE router.

The symptom is timing-dependent. The symptom does not occur all the time and does not seem to

be Cisco 12000 series line card-dependent, nor is it specific to a link between the two P router

because the symptom may also occur when you pull the TX fiber cable of a line card that forms the

link between a PE router and a P router.

Workaround: There is no workaround.

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