Cisco Cisco Packet Data Gateway (PDG)
Troubleshooting
Verifying Network Connectivity ▀
ASR 5500 System Administration Guide, StarOS Release 18 ▄
203
The following displays a sample output.
traceroute6 to 2001:4A2B::1f3F (2001:4A2B::1f3F), 30 hops max, 40 byte packets
1 2001:4A2B::1f3F (2001:4A2B::1f3F) 0.446 ms 0.235 ms 0.178 ms
1 2001:4A2B::1f3F (2001:4A2B::1f3F) 0.446 ms 0.235 ms 0.178 ms
Viewing IP Routes
The system provides a mechanism for viewing route information to a specific node or for an entire context. This
information can be used to verify network connectivity and to ensure the efficiency of the network connection. The
command has the following syntax:
information can be used to verify network connectivity and to ensure the efficiency of the network connection. The
command has the following syntax:
show ip route [ route_ip_address ]
show ipv6 route [ route_ipv6_address ] ]
For complete information on the above commands, see the Exec Mode show Commands chapter of the Command Line
Interface Reference.
Interface Reference.
If no keywords are specified, all IP routes within the context’s routing table are displayed.
The following displays a sample of this command’s output showing a context IPv4 routing table.
"*" indicates the Best or Used route.
Destination Nexthop Protocol Prec Cost Interface
*0.0.0.0/0 10.0.4.1 static 0 0 SPIO1
*10.0.4.0/24 0.0.0.0 kernel 0 0 SPIO1
*10.0.4.0/32 0.0.0.0 kernel 0 0 SPIO1
*10.0.4.3/32 0.0.0.0 kernel 0 0 SPIO1
*10.0.4.255/32 0.0.0.0 kernel 0 0 SPIO1
Destination Nexthop Protocol Prec Cost Interface
*0.0.0.0/0 10.0.4.1 static 0 0 SPIO1
*10.0.4.0/24 0.0.0.0 kernel 0 0 SPIO1
*10.0.4.0/32 0.0.0.0 kernel 0 0 SPIO1
*10.0.4.3/32 0.0.0.0 kernel 0 0 SPIO1
*10.0.4.255/32 0.0.0.0 kernel 0 0 SPIO1
Viewing the Address Resolution Protocol Table
The system provides a mechanism for viewing Address Resolution Protocol (ARP) table information to a specific node
or for an entire context. This information can be used to verify that when the system sends an ARP packet, it receives
valid responses from other network nodes.
or for an entire context. This information can be used to verify that when the system sends an ARP packet, it receives
valid responses from other network nodes.
[local]host_name# show ip arp [ arp_ip_address ]
arp_ip_address specifies a specific network node for which to display ARP information. The address can be entered in
IPv4 dotted-decimal or IPv6 colon-separated-hexadecimal notation. If this keyword is not specified, all entries within
the context’s ARP table are displayed.
IPv4 dotted-decimal or IPv6 colon-separated-hexadecimal notation. If this keyword is not specified, all entries within
the context’s ARP table are displayed.
Important:
Restarting the VPN Manager removes all interfaces from the kernel which in turn removes all ARP
entries. However, the NPU still retains all of the ARP entries so that there is no traffic disruption. From a user point of
view, show ip arp is broken since this command gathers information from the kernel and not the NPU.
view, show ip arp is broken since this command gathers information from the kernel and not the NPU.