About BGP TTL(JUNOS & IOS)

在JUNOS中,对于EBGP/IBGP邻居的TCP连接,IP报文中缺省TTL不相同:
(当然TTL值可以通过配置命令进行修改)
1)For IBGP, default TTL=64;
2)For EBGP,
without set multihop, default TTL=1;
with set multihop but not the ttl statement following, default TTL=64;
在IOS中,
1)For IBGP, default TTL=255;
2)For EBGP,
without the neighbor x.x.x.x ebgp-multihop x statement, multihop is defaultly on and TTL=1;
with neighbor x.x.x.x ebgp-multihop but not specifying the number following, default TTL=255.

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