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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)S13
Conditions: BGP is exchanging only IPv6 capability with the remote EBGP peer, but IPv4 capability
will be enabled by default. The remote EBGP peer is sending only IPv6 capability, and we should
advertise only IPv6 prefixes because that is the capability negotiated. We are wrongly marking IPv4
capability as negotiated and advertising IPv4 prefixes, and the remote neighbor is resetting the
session because IPv4 capability is not negotiated at the peer end.
Workaround: Configure a route map to deny all IPv4 prefixes, and apply it as follows:
Route-map deny-ipv4 deny 10
Router /jointfilesconvert/415844/bgp <asnum>
address-family ipv4
Neighbor <IPv6Address> activate
Neighbor <IPv6Address> route-map <deny-ipv4> out
• CSCta79412
Symptoms: BGP sessions get stuck in an active state.
Conditions: The symptom is observed when using the neighbor fall-over command.
Workaround: There is no workaround.
Resolved Caveats—Cisco IOS Release 12.0(32)S13
Cisco IOS Release 12.0(32)S13 is a rebuild of Cisco IOS Release 12.0(32)S. The caveats listed in this
section are resolved in Cisco IOS Release 12.0(32)S13 but may be open in previous Cisco IOS releases.
This section describes only severity 1, severity 2, and select severity 3 caveats.
• CSCsg00102
Symptoms: SSLVPN service stops accepting any new SSLVPN connections.
Conditions: A device configured for SSLVPN may stop accepting any new SSLVPN connections,
due to a vulnerability in the processing of new TCP connections for SSLVPN services. If the debug
ip tcp transactions command is enabled and this vulnerability is triggered, debug messages with
connection queue limit reached will be observed.
This vulnerability is documented in two separate Cisco bug IDs, both of which are required for a
full fix CSCso04657 and CSCsg00102.
• CSCsg54016
Symptoms: With ATMoMPLS with AAL5 encapsulation, the xconnect session bounces when you
enter and exit PVC configuration mode without making any configuration changes.
Conditions: This symptom is observed only when the <CmdBold>oam-ac
emulation-enable<noCmdBold> command is used.
Workaround: There is no workaround.
• CSCsl49628
Symptoms: When a VPN routing/forwarding (VRF) is deleted through the CLI, the VRF deletion
never completes on the standby RP, and the VRF cannot be reconfigured at a later time.
Conditions: This symptom is observed when BGP is enabled on the router.
Workaround: There is no workaround.
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