Cisco Cisco IOS Software Release 12.2(11)YV
10
Release Notes for the Cisco 1700 Series Routers for Cisco IOS Release 12.2(11)YV
OL-3706-02
Caveats
CSCdz71127
Cisco routers and switches running Cisco IOS software and configured to process Internet Protocol
version 4 (IPv4) packets are vulnerable to a Denial of Service (DoS) attack. A rare sequence of crafted
IPv4 packets sent directly to the device may cause the input interface to stop processing traffic once the
input queue is full. No authentication is required to process the inbound packet. Processing of IPv4
packets is enabled by default. Devices running only IP version 6 (IPv6) are not affected. A workaround
is available.
version 4 (IPv4) packets are vulnerable to a Denial of Service (DoS) attack. A rare sequence of crafted
IPv4 packets sent directly to the device may cause the input interface to stop processing traffic once the
input queue is full. No authentication is required to process the inbound packet. Processing of IPv4
packets is enabled by default. Devices running only IP version 6 (IPv6) are not affected. A workaround
is available.
Cisco has made software available, free of charge, to correct the problem.
This advisory is available at
CSCea02355
Cisco routers and switches running Cisco IOS software and configured to process Internet Protocol
version 4 (IPv4) packets are vulnerable to a Denial of Service (DoS) attack. A rare sequence of crafted
IPv4 packets sent directly to the device may cause the input interface to stop processing traffic once the
input queue is full. No authentication is required to process the inbound packet. Processing of IPv4
packets is enabled by default. Devices running only IP version 6 (IPv6) are not affected. A workaround
is available.
version 4 (IPv4) packets are vulnerable to a Denial of Service (DoS) attack. A rare sequence of crafted
IPv4 packets sent directly to the device may cause the input interface to stop processing traffic once the
input queue is full. No authentication is required to process the inbound packet. Processing of IPv4
packets is enabled by default. Devices running only IP version 6 (IPv6) are not affected. A workaround
is available.
Cisco has made software available, free of charge, to correct the problem.
This advisory is available at
Open Caveats for Release 12.2(11)YV
The following sections lists the open caveats for the Cisco IOS release 12.2(11)YV.
CSCdz65951
Calls using E&M Immediate Start and Delay Start lines on a channel bank connection do not succeed.
First dialed digit from the E&M analog/T1 line on a call that flows through a Cisco 1760 router channel
bank connection does not reach the destination end. This happens only when the dial out delay is
configured to be less than 135 ms at the call originating node. This problem happens only when the call
flows through a Cisco 1760 router channel bank connection. It does not happen on switched calls
through the Cisco 1760 router.
First dialed digit from the E&M analog/T1 line on a call that flows through a Cisco 1760 router channel
bank connection does not reach the destination end. This happens only when the dial out delay is
configured to be less than 135 ms at the call originating node. This problem happens only when the call
flows through a Cisco 1760 router channel bank connection. It does not happen on switched calls
through the Cisco 1760 router.
Workaround
Configure the dialout delay to be at least 135 ms.
CSCdz67774
Channel bank does not work with analog FXS ground start.