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2921 router interface shows up and up but unable to PING peer

STEVE FOWLER
Level 1
Level 1

I have a 2921 router directly connected to an Ethernet MPLS network, one of about 10 location all configured the same. This is a new install and has been tested by the LEC to be good however, even thought the interface below indicates to be up/up we are unable to PING the peer IP address or establish a BGP session. I have chaned the speed/duplex to every combination possible and tried makeing the VLAN ID 16 native but nothing works.

Does anyone know where I might start looking for the problem?

interface GigabitEthernet0/2

description descript Circuit ID:

bandwidth 5120

ip vrf forwarding main

no ip address

duplex auto

speed auto

no keepalive

no cdp enable

!

end

MPLS#sh run int g0/2.16

Building configuration...

Current configuration : 240 bytes

!

interface GigabitEthernet0/2.16

description

bandwidth 5120

encapsulation dot1Q 16

ip vrf forwarding main

ip address 10.70.0.149 255.255.255.252

no ip redirects

no ip proxy-arp

no cdp enable

end

MPLS#sh int g0/2

GigabitEthernet0/2 is up, line protocol is up

  Hardware is CN Gigabit Ethernet, address is c84c.7537.a592 (bia c84c.7537.a592)

  Description: descript Circuit ID:

  MTU 1500 bytes, BW 5120 Kbit/sec, DLY 100 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation 802.1Q Virtual LAN, Vlan ID  1., loopback not set

  Keepalive not set

  Full-duplex, 100Mb/s, media type is RJ45

  output flow-control is XON, input flow-control is XON

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:03, output 00:00:03, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     1058 packets input, 69805 bytes, 0 no buffer

     Received 6 broadcasts, 0 runts, 0 giants, 0 throttles

     4 input errors, 2 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 2 multicast, 0 pause input

     0 input packets with dribble condition detected

     1054 packets output, 69405 bytes, 0 underruns

     0 output errors, 0 collisions, 6 interface resets

     2 unknown protocol drops

     0 babbles, 0 late collision, 0 deferred

     9 lost carrier, 0 no carrier, 0 pause output

     0 output buffer failures, 0 output buffers swapped out

MPLS#sh  int g0/2.16

GigabitEthernet0/2.16 is up, line protocol is up

  Hardware is CN Gigabit Ethernet, address is c84c.7537.a592 (bia c84c.7537.a592)

  Description: SPECTRUM_IF_ALIAS_145f500a

  Internet address is 10.70.0.149/30

  MTU 1500 bytes, BW 5120 Kbit/sec, DLY 1000 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation 802.1Q Virtual LAN, Vlan ID  16.

  Keepalive set (10 sec)

  ARP type: ARPA, ARP Timeout 04:00:00

  Last clearing of "show interface" counters never

MPLS#sh ip bgp vpnv4 vrf main summ

BGP router identifier 199.160.108.231, local AS number 65007

BGP table version is 178, main routing table version 178

145 network entries using 20880 bytes of memory

285 path entries using 14820 bytes of memory

56/25 BGP path/bestpath attribute entries using 7392 bytes of memory

16 BGP AS-PATH entries using 560 bytes of memory

2 BGP community entries using 48 bytes of memory

10 BGP extended community entries using 1026 bytes of memory

0 BGP route-map cache entries using 0 bytes of memory

0 BGP filter-list cache entries using 0 bytes of memory

BGP using 44726 total bytes of memory

139 received paths for inbound soft reconfiguration

BGP activity 351/192 prefixes, 704/390 paths, scan interval 60 secs

Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd

10.70.0.150     4        21302       0       0        1    0    0 never    Active

MPLS#sh run | b router bgp

router bgp 65007

bgp router-id 199.160.108.231

bgp router-id vrf auto-assign

bgp log-neighbor-changes

!

address-family ipv4

  no synchronization

  network 10.34.3.0 mask 255.255.255.0

  network 10.34.17.0 mask 255.255.255.0

  network 10.34.24.0 mask 255.255.255.0

  network 10.34.90.0 mask 255.255.255.0

  network 10.34.100.0 mask 255.255.255.0

  network 10.34.125.0 mask 255.255.255.0

  no auto-summary

exit-address-family

!

  address-family ipv4 vrf main

  no synchronization

  network 10.34.3.0 mask 255.255.255.0

  network 10.34.17.0 mask 255.255.255.0

  network 10.34.24.0 mask 255.255.255.0

  network 10.34.90.0 mask 255.255.255.0

  network 10.34.100.0 mask 255.255.255.0

  network 10.34.125.0 mask 255.255.255.0

  network 10.70.0.36 mask 255.255.255.252

  network 199.160.108.231 mask 255.255.255.255

  redistribute static

  neighbor 10.70.0.37 remote-as 1803

  neighbor 10.70.0.37 activate

  neighbor 10.70.0.37 soft-reconfiguration inbound

  neighbor 10.70.0.150 remote-as 21302

  neighbor 10.70.0.150 local-as 64608 no-prepend replace-as

  neighbor 10.70.0.150 activate

exit-address-family

16 Replies 16

the problem was stated as the folowing

"I too have the same issue and have tried fiddling with speed and duplex. Have also plugged a laptop into both the provider handoff and separately the router wan port and am able to ping the laptop from router and provider next hop successfully. I plug the router into the handoff and no ping / incomplete arp. I have tried configuring different router ports with same result. Have tried loopback cable with same result.  Provider insists problem is our equipment. Any suggestions / ideas?"

I too have same issue, was this resolved and if so how.

So you are particularly interested in the post by tbarkhaus in June 2018. This might or might not be the same as the issues posted in July 2013 and Feb 2016. I hope that tbarkhaus is still participating in the forum and will respond about whether the issue was solved.

 

HTH

 

Rick

HTH

Rick