Cisco 7600-ES20-GE3CXL-RF - Ethernet Services 20G Line Card Switch Instrukcja Użytkownika Pobierz pdf (Strona 55)

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Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8

OL-10394-05 Rev. R0

• CSCta73054

Symptoms: When using passive FTP with NAT VRF, the connection is broken after NAT in the

Cisco 7300. The port numbers are not consistent.

The source port is translated from “X_PORT” to “Y_PORT”, but after NAT to the outside, the port

still remains the same. This breaks the passive FTP session.

Conditions: This issue is observed when using Cisco IOS Releases 12.2(31)SB11, 12.2(31)SB14,

12.2(33)SB3a and 12.2(33)SB5 when using VRF NAT and trying to establish passive FTP

connections across the Cisco 7300.

Workaround: No issues are observed when Cisco IOS Release 12.2(25)S11 is used. The passive FTP

session and NAT behave as expected.

• CSCta75687

Symptoms: BGP sends the withdrawn message to a peer as if a prefix was labeled (even though the

prefix is not labeled). This can cause interoperability problems if the peer does not understand the

message and may lead to routing loops in the network.

Conditions: The symptom is observed on a router configured with BGP peering with another

vendor’s router.

Workaround: Unconfigure the send-label knob. (The existing session will flap since capability will

have to be renegotiated.)

• CSCta77678

Symptoms: RTP timestamp on the RFC 2833 event is modified. IP Phones are using RFC2833 to

transport the DTMF signals, which causes problems with the Voicemail systems.

Conditions: This symptom occurs when RTP header compression is enabled.

Workaround: There is no workaround.

Further Problem Description: The problem disappears if cRTP is disabled. The issue is seen with

Class-Based cRTP configured and also with other cRTP configuration types.

• CSCta79313

Symptoms: When the router is running EIGRP, there are a lot (hundreds) of routes in the routing

table and when changes to the prefix-list are applied (it does not matter if it is currently used by

EIGRP or not) high CPU is observed. The process that is causing high CPU is EIGRP-IPv4.

Sometimes there can be observed a %SYS-3-CPUHOG for EIGRP-IPv4 process.

Conditions: The issue is hardware independent so can be observed on any router with EIGRP prefix

lists, and lots of routes in the RIB (routing table). Additionally there must be at least one redistribute

command on EIGRP as well.

Please note that problem could also occur without the BGP routing process, but the necessary

condition is for the device to have many routes in the RIB table (BGP has been the logical source

for introducing large numbers of routes to the routing table).

Workaround: There is no workaround.

Further Problem Description: To mitigate the impact of this issue, minimize changes to prefix lists

or do during a scheduled maintenance window where brief periods of high CPU may not cause

customer impact.

• CSCta85026

Symptoms: CLI does not accept white spaces in the DHCP option 60 Vendor Class Identifier (VCI)

ASCII string, and shows the following error message:

1 2 ... 50 51 52 53 54 55 56 57 58 59 60 ... 397 398

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