Cisco Bug: CSCun36895 - PGW rejecting all IPv6 PDP Requests
Dec 26, 2016
- Cisco ASR 5000 Series
Known Affected Releases
Symptom: W0575CnBPGP2 is rejecting all IPv4v6 requests with single-bearer-only-allowed, and all IPv6-only requests with no dynamic PDP address available. W0575CnBPGP1 has effectively same configuration, and works fine. This started after the IPv6 routing issues on Feb-11 and is still happening. We have a mon sub from both PGW1(working) and PGW2(not working). In the failed case, we get a few errors: ***CONTROL*** 19:46:43:691 Eventid:10539 Destination context sgi_ctx has no IPv6 interface. Rejecting call ***CONTROL*** 19:46:43:691 Eventid:10755 Sessmgr-253 -- Local Pool IP Validation FAILED with disconnect reason <lpool-ip-validation-failed>, IP Address <::/0>, imsi <302610012405789>, apn <proxy1.bell.ca> <<<<OUTBOUND 19:46:43:692 Eventid:47001(3) GTPC Tx PDU, from 188.8.131.52:2123 to 184.108.40.206:19005 (14) TEID: 0x830C8005, Message type: GTP_CREATE_PDP_CONTEXT_RES_MSG (0x11) Sequence Number:: 0x54F4 (21748) GTP HEADER FOLLOWS: Version number: 1 Protocol type: 1 (GTP C/U) Extended header flag: Not present Sequence number flag: Present NPDU number flag: Not present Message Type: 0x11 (GTP_CREATE_PDP_CONTEXT_RES_MSG) Message Length: 0x0006 (6) Tunnel ID: 0x830C8005 Sequence Number: 0x54F4 (21748) GTP HEADER ENDS. INFORMATION ELEMENTS FOLLOW: Cause: 0xD3 (GTP_ALL_DYNAMIC_PDP_ADDR_OCCUPIED) INFORMATION ELEMENTS END. All the IPv6 interfaces are down (intentionally) on both PGW1 and PGW2 due to the Feb-11 outages: Conditions: IP pool seems to be ok: [sgi_ctx]W0575CnBPGP2# show ipv6 pool pool-name test_pool_v6 verbose Tuesday February 18 19:51:45 UTC 2014 Pool Name: test_pool_v6 Group Name: Pool Type: Public Priority: 1 Pool Id: 2001 Pool Status: Good Start Prefix: 2605:b100:f300::/64 End Prefix: 2605:b100:f300:ff::/64 Total Prefix: 256 Used Prefix: 2 Free Prefix: 254 Pool Address Type: Normal Configured Prefix: 2605:b100:f300::/56 Nexthop Forwarding Address: Disabled Suppress-Switchover-ADVS: Disabled Allow-Static-Allocation: Enabled Duplicate-Addr-Detection: Disabled Group Available Threshold: Disabled Clear: Disabled Pool-Free Threshold: Disabled Clear: Disabled Pool-Used Threshold: Disabled Clear: Disabled [sgi_ctx]W0575CnBPGP1# show ipv6 interface summary Tuesday February 18 19:59:42 UTC 2014 Interface Name Address/Mask Port Status ============================== =================== ================== ====== int1_sgi_v6 2605:b100:f2f6:20::2/64 20/1 vlan 1619 DOWN int2_sgi_v6 2605:b100:f3f6:20::2/64 21/1 vlan 1621 DOWN int3_sgi_v6 2605:b100:f2f6:21::2/64 22/1 vlan 1620 DOWN int4_sgi_v6 2605:b100:f3f6:21::2/64 23/1 vlan 1622 DOWN Total interface count: 4 [sgi_ctx]W0575CnBPGP2# show ipv6 interface summary Tuesday February 18 19:59:48 UTC 2014 Interface Name Address/Mask Port Status ============================== =================== ================== ====== int1_sgi_v6 2605:b100:f2f6:30::2/64 20/1 vlan 1623 DOWN int2_sgi_v6 2605:b100:f3f6:30::2/64 21/1 vlan 1625 DOWN int3_sgi_v6 2605:b100:f2f6:31::2/64 22/1 vlan 1624 DOWN int4_sgi_v6 2605:b100:f3f6:31::2/64 23/1 vlan 1626 DOWN Total interface count: 4 But only PGW2 is rejecting the PDPs, and we know it started doing this after the Feb-11 outage.
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