Cisco ASR 5500 Installation Manual - Page 25

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Cisco ASR 5500 Installation Manual
Troubleshooting

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 [
show ipv6 route [
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
*0.0.0.0/0
*10.0.4.0/24
*10.0.4.0/32
*10.0.4.3/32
*10.0.4.255/32

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#
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.
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.
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
10.0.4.240
10.0.4.7
10.0.4.1
]
route_ip_address
route_ipv6_address
Nexthop
Protocol
10.0.4.1
static
0.0.0.0
kernel
0.0.0.0
kernel
0.0.0.0
kernel
0.0.0.0
kernel
show ip arp [
arp_ip_address
Link Type
Link Address
ether
00:05:47:02:20:20
ether
00:05:47:02:03:36
ether
00:01:30:F2:7F:00
] ]
Prec
Cost
Interface
0
0
SPIO1
0
0
SPIO1
0
0
SPIO1
0
0
SPIO1
0
0
SPIO1
]
Flags
Mask Interface
C
MIO1
C
MIO1
C
MIO1
Viewing IP Routes
Troubleshooting
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