Use ip ttl- expires enable to enable sending ICMP time exceeded messages.. Use undo ip ttl- expires enable to disable sending ICMP time exceeded messages.. Syntax. ip ttl- expires enable . undo ip ttl- expires enable . Default. Sending ICMP time exceeded messages is disabled. Views. System view. Predefined user roles. network-admin. Usage guidelines, Before performing the trace route operation on the Web interface, on the intermediate device. execute the ip ttl-expires enable command to enable the sending of ICMP timeout packets and on. the destination device execute the ip unreachables enable command to enable the sending of. ICMP destination unreachable packets.
Use ip unreachables enable to enable sending ICMP destination unreachable messages.. Use undo ip unreachables enable to disable sending ICMP destination unreachable messages.. Syntax. ip unreachables enable . undo ip unreachables enable . Default. Sending ICMP destination unreachable messages is disabled. Views. System view. Predefined user roles. network-admin, In HP Comware, these are disabled by default, they can be enabled with these commands: ip unreachables enable. ip ttl-expires enable. Some fair warning if the network is not fairly congested, enabling these should not have that much impact on the CPU on the network device. 3 Comments.
5/29/2019 · Unlike any other vendor I’ve worked on, comware switches and routers do not reply to traceroute attempts by default. If you traceroute through a router you’ll get no response on that hop: C:>tracert switch1 Tracing route to switch1 [10.4.228.2] over a maximum of 30 hops: 1 <1 ms <1 ms <1 ms router2 [1.1.1.76] 2…, 5/28/2018 · Initial setting & basic command of HPE(H3C) switch ~ VLAN configuration, ssh, snmp, ntp, syslog ~ ... [HOGE] ip ttl- expires enable [HOGE] ip unreachables enable . I do not use STP at this time [HOGE] undo stp global enable . LoopbackDetection instead (do not put it on the uplink), 12/3/2010 · On HPEs Comware based FlexFabric switches by default answering to traceroute is disabled. To enable traceroute on a FF5700 families switch you need to activate: ip unreachable enable ip ttl- expires enable . As of then, the switch should show up in traceroutes with something different than timeouts. Kyp. F.
