Cisco OL-4015-08 Bedienungsanleitung PDF herunterladen (Seite 197)

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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(32)S9

2. If tag-switching advertise-tags oldstyle or mpls ldp advertise-labels oldstyle is configured,

and the access-list used as prefix-acl in tag-switching advertise-tags [for <prefix-acl>] [to

<tsr-acl>] or mpls ldp advertise-labels [for <prefix-acl>] [to <lsr-acl>] has been changed,

it may result the LSR not advertise label bindings to or withdraw label bindings from peers as

expected.

Conditions: Occurs in the following scenarios:

1. When changing of the access lists cause LDP performing following task:

–

Withdraw label bindings for some prefixes from a set of peers;

–

Re-advertise label bindings for these prefixes to the same set of peers;

2. The access-list explicitly permits/denies a prefix (including explicit “permit any” or “deny

any”) before the change, and after the change it explicitly denies/permits a prefix (including

explicit “deny any” or “permit any”).

Workaround: For problem 1:

a. After performing the changes of access lists which cause LDP withdraw label bindings, wait for

a short time to ensure label bindings have been withdrawn before performing the changes of access

lists which cause LDP re-advertise label bindings.

b. If problem already happened, recover it by performing the same changes in a pace as described

in a., or toggle “mpls ip” on the interface.

c. Change the access-list name used by prefix-acl.

For problem 2:

a. Remove the access-list completely, with a short time to ensure label bindings have been

withdrawn/advertised to all peers as expected, then add back the desired access-list.

b. Toggling “mpls ip” on the interface.

c. Change the access-list name used by prefix-acl.

• CSCsk15520

Symptoms: In case that multiple MPLS Traffic Engineering(MPLS-TE) Tunnels and Fast

Reroute(FRR) are configured on Cisco 12000 series router, in event of FRR invoking, unaffected

MPLS-TE tunnel is also protected by FRR unexpectedly.

Conditions: The MPLS-TE Tunnels are Equal Cost Multipath for BGP Nexthop. Once one of tunnels

is restored by FRR, the other tunnel which is not affected may be protected also and the backup

Tunnel continue “active” status in FRR database. After FRR invoking and reoptimized to a

secondary path, BGP routes are balanced into both one primary tunnel and one backup tunnel which

should not be activated.

Workaround: There is no workaround.

• CSCsk19661

Symptoms: In a Cisco 7500 HA router in RPR+ Mode when configuring and unconfiguring channel

groups under an E1 controller, the router reports the following:

*Aug 22 17:58:34.970: %HA-2-IPC_ERROR: Failed to open peer port. timeout *Aug 22

17:58:34.974: %HA-3-SYNC_ERROR: CCB sync failed for slot: 1 *Aug 22 17:58:34.974:

%HA-5-SYNC_RETRY: Reloading standby and retrying sync operation (retry 1).

and the standby RSP is reloaded.

Conditions: This symptom is observed when configuring and unconfiguring channel groups under

an E1 controller.

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