Cisco ASR 5000 Series Administration Guide

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:
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.
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
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.
[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.
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.
Important
The following displays a sample of this command's output showing a context's ARP table.
Flags codes:
C - Completed, M - Permanent, P - Published, ! - Not answered
T - has requested trailers
Address Link Type Link Address Flags Mask Interface
10.0.4.240 ether 00:05:47:02:20:20 C MIO1
10.0.4.7 ether 00:05:47:02:03:36 C MIO1
10.0.4.1 ether 00:01:30:F2:7F:00 C MIO1
ASR 5500 System Administration Guide, StarOS Release 21.4
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Troubleshooting
Viewing IP Routes

Cisco ASR 5000 Series Specifications

General

Brand	Cisco
Model	ASR 5000 Series
Category	Network Router
Language	English