Cisco OL-4015-08 Manual de usuario descargar pdf (Pagina 248)

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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)S5

Conditions: This symptom has been observed on Cisco 12000 Series Internet Router distributed

platforms with Interface or Hello events that activate TE FRR. With TE tunnels, manually

configured tunnels are affected, but the symptom is more likely to be seen with auto-tunnel primary

and auto-tunnel mesh.

Workaround: There is no workaround. The router must be reloaded, or each line card reset.

Further Problem Description: There is a data table in memory on the RP and each LC that contains

the current status and forwarding information for FRR protection. The data should always be in

sync, so that the RP and line cards have the same FRR state, but with this symptom, the tables on

the line cards become out of sync with the RP, and contain stale information. The situation becomes

worse over time as more stale entries are created. The tunnel items are not deleted from the

TFIB/FRR database when a tunnel ID is reused by the RP to signal a tunnel to a new destination.

These old entries may get chosen for FRR instead of the latest, correct ones, causing incorrect FRR

forwarding and incorrect FRR status. Because the tunnels involve multiple destinations and multiple

interfaces, with out-of-date forwarding, interface transitions on any TE interface may cause

unexpected traffic on any other TE interface. Also, because it is not expected that multiple entries

exist for a single tunnel ID, it is difficult to predict which entries will be used, and whether or not

an interface event will result in incorrect forwarding.

• CSCse96746

Symptoms: SIP401, SIP501, SIP600, or SIP601 reloads after any of these conditions:

–

A SPA OIR

–

Interface shutdown and restart

–

Any other condition leading to FRR activation.

Conditions: This symptom occurs only during the following conditions:

–

Incoming traffic is MPLS.

–

Primary link of FRR goes down and backup link becomes active.

–

The backup link is through an interface on an E2, E4, E4+, or E6 card.

–

ToFab QOS and/or FrFab QOS are configured on an E2, E4, E4+, or E6 card.

–

The symptom happens only in Cisco IOS Release 12.0(32)S release and above and is not

applicable to Cisco IOS Release 12.0(31)S.

Workaround: Ensure that backup links are not E2, E4, E4+, or E6 under these FRR conditions.

• CSCse97331

Symptoms: Disabling scrambling on an OC48-POS SPA will be lost if a router reload occurs,

resulting in a failed link.

Conditions: This symptom is observed with SPA-2xOC48POS/RPR in an Engine 5

Cisco 12000-SIP-601 or Cisco 12000-SIP-600 line card in a Cisco 12000 series router. Additional

testing indicates that all supported POS SPA’s are affected as shown in this list:

–

2xOC3c POS SPA

–

4xOC3c POS SPA

–

1xOC12c POS SPA

–

1xOC48c POS/RPR SPA

–

4xOC48c POS/RPR SPA

–

1xOC192c POS/RPR SPA

Workaround: There is no workaround.

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