BGP 对等互连没有出现 /31 子网
3046
Created On 07/07/21 17:59 PM - Last Modified 06/24/25 21:10 PM
Symptom
- BGP 同行留在ACTIVE模式，不会移动到ESTABLISHED状态。
- 注意 var/log/pan/routed.log 中的以下日志
2021-06-15 11:03:37.813 -0700 debug: pan_socket(src/pan_dc_sck.c:788): new socket 1565 opened for domain 2 type 1 proto 0, total opened socket 3. 2021-06-15 11:03:37.813 -0700 debug: pan_bind(src/pan_dc_sck.c:831): bind socket 1565 successfully. **** AUDIT 0x0303 - 7 (0000) **** I:000015c4 F:00000002 sckrecv.c 1249 :at 11:03:37, 15 June 2021 (410673 ms) Processed an ATG_SCK_SOCKET IPS OK. Socket ID = 1565 Socket type = 0X00000001 Socket family = 0X00000002 Socket protocol = 0X00000000 Application handle = 0X03B40000 Stub socket handle = 0X2DA40000 Local inet address = 10.20.0.46 Local port = 0 Remote inet address = 10.20.0.47 Remote port = 179 **** PROBLEM 0x0303 - 20 (0000) **** I:000015c6 F:00000001 sckrecv2.c 1968 :at 11:03:37, 15 June 2021 (410673 ms) Failed to connect to remote address. Sockets error code = 101 Remote address = 10.20.0.47 Remote port = 179 Socket ID = 1565 Socket type = 0X00000001 Socket family = 0X00000002 Socket protocol = 0X00000000 Stub socket handle = 0X2DA40000 Application handle = 0X03B40000
Environment
- BGP 使用 /31 子网接口的对等体。
- BGP 会话由对端发起。
Cause
- 这是预期的行为，因为 /31 子网不完全支持PAN-OS.
- 什么时候BGP会话由具有 /31 子网的对等方发起，不会创建套接字，也不会向对等方发送任何数据包。套接字错误是“101 = 网络无法访问”
Resolution
- 使用 /30 或其他子网。
- 如果可能，禁用传出BGP对等方的会话。 如果firewall正在启动BGPsession 那么这个问题是没有看到的。