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rkhanso
New Contributor

TTL in show arp the same for all entries

The router has 2 Ethernet interfaces - one WAN, one LAN. No QoS. No firewall.

I'm looking at a Netvanta 3450 router that is seeing 'input errors' and 'no buffer' counters incrementing on both the LAN and WAN interface. The count is incrementing the same per interface, but not the same on both interfaces.....if that makes sense.

They are complaining about packet loss. The interfaces are not seeing any drops, errors, collisions - nothing to indicate any trouble there....other than those input error and no buffer count incrementing at the same rate.

When looking at the arp cache, the TTL field is looking suspect to me.  The count is either 0 or 19 (one is at 20) and doesn't change for all of the entries:

10.123.1.32  0(Unresolved)   eth 0/2            Dynamic
10.123.2.1   19   00:15:C5:E7:38:77  eth 0/2            Dynamic
10.123.2.4   19   00:04:23:86:F6:56  eth 0/2            Dynamic
10.123.2.11  19   00:11:85:D5:45:0E  eth 0/2            Dynamic
10.123.2.12  19   00:22:19:27:E2:36  eth 0/2            Dynamic
10.123.2.14  19   D4:BE:D9:B5:42:7C  eth 0/2            Dynamic
10.123.2.21  19   00:0E:7F:FD:B5:25  eth 0/2            Dynamic
10.123.2.27  19   00:24:E8:6A:4B:D9  eth 0/2            Dynamic
10.123.2.37  19   00:22:19:27:E2:18  eth 0/2            Dynamic
10.123.2.44  19   00:30:6E:0C:8A:AA  eth 0/2            Dynamic
10.123.2.45  19   00:30:6E:09:51:77  eth 0/2            Dynamic
10.123.2.50  19   00:24:E8:6F:FA:BC  eth 0/2            Dynamic
10.123.2.52  19   00:10:18:91:E6:B2  eth 0/2            Dynamic
10.123.2.55  19   84:2B:2B:FE:3C:86  eth 0/2            Dynamic
10.123.2.56  19   00:1E:C9:53:47:DC  eth 0/2            Dynamic
10.123.2.57  19   00:24:E8:6A:4D:B5  eth 0/2            Dynamic
10.123.2.58  19   00:1E:C9:4A:B3:51  eth 0/2            Dynamic
10.123.2.60  19   00:1E:C9:4A:91:26  eth 0/2            Dynamic
10.123.2.100 19   D4:AE:52:CE:41:7B  eth 0/2            Dynamic
10.123.2.200 19   00:11:85:C3:06:5B  eth 0/2            Dynamic
10.123.10.2  19   C8:1F:66:25:EB:DF  eth 0/2            Dynamic
10.123.10.4  19   18:03:73:34:F9:8A  eth 0/2            Dynamic
10.123.10.6  19   34:17:EB:B3:CC:71  eth 0/2            Dynamic
10.123.10.8  19   C8:1F:66:05:E2:16  eth 0/2            Dynamic
10.123.10.9  19   F8:B1:56:A1:DF:BA  eth 0/2            Dynamic
10.123.10.10 19   F8:BC:12:7B:9F:B3  eth 0/2            Dynamic
10.123.10.13 19   18:03:73:C5:9C:C4  eth 0/2            Dynamic
10.123.10.17 19   F0:1F:AF:4A:E2:F7  eth 0/2            Dynamic
10.123.10.20 19   5C:F9:DD:74:83:8D  eth 0/2            Dynamic
10.123.10.23 19   F0:1F:AF:29:F0:47  eth 0/2            Dynamic
10.123.10.25 19   EC:F4:BB:18:A7:BB  eth 0/2            Dynamic
10.123.10.32 19   C8:1F:66:25:EC:03  eth 0/2            Dynamic
10.123.10.33 19   90:B1:1C:A0:DD:69  eth 0/2            Dynamic
10.123.10.35 19   F8:BC:12:6D:C6:DF  eth 0/2            Dynamic
10.123.10.36 19   A4:1F:72:7B:EF:16  eth 0/2            Dynamic
10.123.10.37 19   34:17:EB:C1:6A:6B  eth 0/2            Dynamic
10.123.10.42 19   C8:1F:66:25:F7:E4  eth 0/2            Dynamic
10.123.10.43 20   D4:BE:D9:A6:09:6D  eth 0/2            Dynamic
10.123.10.47 19   F8:B1:56:A2:40:6B  eth 0/2            Dynamic
10.123.10.52 19   C8:1F:66:25:F4:C7  eth 0/2            Dynamic
10.123.10.53 19   34:17:EB:A6:CD:EA  eth 0/2            Dynamic
10.123.10.55 0(Unresolved)   eth 0/2            Dynamic
10.123.10.57 19   34:17:EB:A6:C4:F6  eth 0/2            Dynamic
10.123.10.59 19   00:18:8B:02:9C:1C  eth 0/2            Dynamic
10.123.10.60 19   F8:B1:56:CA:77:BA  eth 0/2            Dynamic
10.123.10.65 19   C8:1F:66:25:F9:B3  eth 0/2            Dynamic
10.123.10.66 19   F0:1F:AF:66:71:20  eth 0/2            Dynamic
10.123.10.68 19   00:24:E8:93:63:80  eth 0/2            Dynamic
10.123.10.69 19   F0:1F:AF:42:26:0D  eth 0/2            Dynamic
10.123.10.73 19   C8:1F:66:05:DF:81  eth 0/2            Dynamic
10.123.10.74 19   A4:1F:72:81:21:E2  eth 0/2            Dynamic
10.123.10.76 19   F8:BC:12:7B:9A:E2  eth 0/2            Dynamic
10.123.10.77 19   B8:CA:3A:BE:D9:96  eth 0/2            Dynamic
10.123.10.78 19   D4:BE:D9:31:3E:CB  eth 0/2            Dynamic
10.123.10.79 19   F0:1F:AF:29:ED:AA  eth 0/2            Dynamic
10.123.10.81 19   34:17:EB:B2:F2:EA  eth 0/2            Dynamic
10.123.10.84 19   F8:B1:56:A1:D7:3F  eth 0/2            Dynamic
10.123.10.85 19   F8:B1:56:9E:FA:96  eth 0/2            Dynamic
10.123.10.88 0C8:1F:66:25:F9:CF  eth 0/2            Dynamic
10.123.10.89 19   00:14:22:2B:9D:AD  eth 0/2            Dynamic
10.123.10.91 19   18:03:73:35:BA:EA  eth 0/2            Dynamic
10.123.10.93 19   00:18:8B:DA:87:88  eth 0/2            Dynamic
10.123.10.94 19   F8:BC:12:7B:4F:EE  eth 0/2            Dynamic
10.123.10.95 19   F0:4D:A2:38:83:6C  eth 0/2            Dynamic
10.123.10.96 19   C8:1F:66:25:EB:CC  eth 0/2            Dynamic
10.123.10.97 19   90:B1:1C:A7:CB:6D  eth 0/2            Dynamic
10.123.10.98 19   90:B1:1C:A0:D9:F4  eth 0/2            Dynamic
10.123.10.10019   34:17:EB:B1:1A:CA  eth 0/2            Dynamic
10.123.10.10119   D4:BE:D9:31:2D:5D  eth 0/2            Dynamic
10.123.10.10919   C8:1F:66:05:E1:7F  eth 0/2            Dynamic
10.123.10.11019   34:17:EB:B2:F2:DE  eth 0/2            Dynamic
10.123.10.11319   00:21:70:17:EF:0F  eth 0/2            Dynamic
10.123.10.12119   C8:1F:66:25:F9:CE  eth 0/2            Dynamic
10.123.10.12519   18:03:73:E9:2E:31  eth 0/2            Dynamic
10.123.10.12619   34:17:EB:BD:17:E7  eth 0/2            Dynamic
10.123.10.12819   00:06:5B:A4:83:96  eth 0/2            Dynamic
10.123.10.13419   BC:30:5B:A6:84:D1  eth 0/2            Dynamic
10.123.10.13819   F0:1F:AF:4A:EB:71  eth 0/2            Dynamic
10.123.10.13919   00:12:3F:CC:B2:8B  eth 0/2            Dynamic
10.123.10.14019   34:17:EB:A5:92:9F  eth 0/2            Dynamic
10.123.10.14219   00:24:E8:05:56:A0  eth 0/2            Dynamic
10.123.10.14419   D4:BE:D9:A5:96:86  eth 0/2            Dynamic
10.123.10.14519   18:03:73:E9:18:A6  eth 0/2            Dynamic
10.123.10.14619   F8:B1:56:A1:E5:AD  eth 0/2            Dynamic
10.123.10.14819   D4:BE:D9:95:BA:52  eth 0/2            Dynamic
10.123.10.15219   34:17:EB:B4:B9:6D  eth 0/2            Dynamic
10.123.10.15319   5C:F9:DD:74:6D:A8  eth 0/2            Dynamic
10.123.10.16019   00:12:3F:C9:EB:EA  eth 0/2            Dynamic
10.123.10.16119   C8:1F:66:25:F5:9E  eth 0/2            Dynamic
10.123.10.16319   F8:BC:12:86:EC:B6  eth 0/2            Dynamic
10.123.10.16419   D4:BE:D9:9B:EB:01  eth 0/2            Dynamic
10.123.10.16719   00:0B:DB:4B:46:ED  eth 0/2            Dynamic
10.123.10.16919   5C:26:0A:6B:FA:4B  eth 0/2            Dynamic
10.123.10.17019   00:21:70:3E:06:92  eth 0/2            Dynamic
10.123.10.17119   00:12:3F:66:79:C7  eth 0/2            Dynamic
10.123.10.17319   A4:1F:72:7C:93:51  eth 0/2            Dynamic
10.123.10.17519   34:17:EB:B4:16:F3  eth 0/2            Dynamic
10.123.10.17719   F8:BC:12:6D:45:FB  eth 0/2            Dynamic
10.123.10.17819   C8:1F:66:23:33:F0  eth 0/2            Dynamic
10.123.10.18219   34:17:EB:B2:E4:C2  eth 0/2            Dynamic
10.123.10.18619   D4:BE:D9:A6:03:CB  eth 0/2            Dynamic
10.123.10.18919   34:17:EB:CF:32:A1  eth 0/2            Dynamic
10.123.10.19119   F0:1F:AF:66:71:16  eth 0/2            Dynamic
10.123.10.19319   00:1A:A0:4E:FE:6A  eth 0/2            Dynamic
10.123.10.19419   F0:1F:AF:66:72:21  eth 0/2            Dynamic
10.123.10.19619   A4:1F:72:81:24:BD  eth 0/2            Dynamic
10.123.10.19719   D4:BE:D9:A6:16:84  eth 0/2            Dynamic
10.123.10.19819   00:21:70:3E:07:13  eth 0/2            Dynamic
10.123.10.20019   18:03:73:E9:14:D4  eth 0/2            Dynamic
10.123.10.20119   C8:1F:66:25:EE:DD  eth 0/2            Dynamic
10.123.10.20419   00:18:8B:02:A2:AA  eth 0/2            Dynamic
10.123.10.20819   00:24:E8:0B:72:F1  eth 0/2            Dynamic
10.123.10.21019   D4:BE:D9:9B:E8:C6  eth 0/2            Dynamic
10.123.10.21319   90:B1:1C:A0:31:37  eth 0/2            Dynamic
10.123.10.21619   34:17:EB:B2:D7:8B  eth 0/2            Dynamic
10.123.10.21720   00:1A:A0:4B:69:29  eth 0/2            Dynamic
10.123.10.21819   A4:1F:72:7D:39:EB  eth 0/2            Dynamic
10.123.10.21919   B8:CA:3A:BE:D9:92  eth 0/2            Dynamic
10.123.10.22019   C8:1F:66:25:F7:E3  eth 0/2            Dynamic
10.123.10.22119   F0:1F:AF:66:71:65  eth 0/2            Dynamic
10.123.10.22319   C8:1F:66:05:E1:81  eth 0/2            Dynamic
10.123.10.22419   D4:BE:D9:A5:6B:2B  eth 0/2            Dynamic
10.123.10.22519   A4:1F:72:81:21:E0  eth 0/2            Dynamic
10.123.10.22619   A4:1F:72:7D:26:F0  eth 0/2            Dynamic
10.123.10.22719   C8:1F:66:05:E2:A5  eth 0/2            Dynamic
10.123.10.22819   B8:CA:3A:BE:D9:9D  eth 0/2            Dynamic
10.123.10.22919   00:1A:A0:4A:95:B2  eth 0/2            Dynamic
10.123.10.23219   00:12:3F:5C:68:E9  eth 0/2            Dynamic
10.123.10.23419   A4:1F:72:81:23:F1  eth 0/2            Dynamic
10.123.10.23519   F0:1F:AF:0A:11:9A  eth 0/2            Dynamic
10.123.10.23619   D4:BE:D9:31:39:EB  eth 0/2            Dynamic
10.123.10.23819   F0:1F:AF:29:F0:FE  eth 0/2            Dynamic
10.123.10.24119   00:1A:A0:4A:42:8A  eth 0/2            Dynamic
10.123.10.24419   D4:BE:D9:A5:99:97  eth 0/2            Dynamic
10.123.10.24519   D4:BE:D9:A5:67:85  eth 0/2            Dynamic
10.123.10.24719   00:24:E8:C2:6A:C3  eth 0/2            Dynamic
10.123.10.24919   34:17:EB:A6:D6:7E  eth 0/2            Dynamic
10.123.10.25019   00:25:90:87:10:D2  eth 0/2            Dynamic
10.123.10.25119   00:1E:0B:3F:1B:17  eth 0/2            Dynamic
10.123.10.25519   00:1E:C9:73:46:42  eth 0/2            Dynamic
10.123.11.0  19   B8:CA:3A:A3:65:84  eth 0/2            Dynamic
10.123.11.2  19   EC:F4:BB:2A:CB:7B  eth 0/2            Dynamic
10.123.11.4  19   C8:1F:66:25:F7:E6  eth 0/2            Dynamic
10.123.11.5  19   00:1A:A0:4C:B0:28  eth 0/2            Dynamic
10.123.11.7  19   EC:F4:BB:56:AE:CA  eth 0/2            Dynamic
10.123.11.12 19   C8:1F:66:05:E2:AF  eth 0/2            Dynamic
10.123.11.13 19   00:12:3F:CB:D4:BC  eth 0/2            Dynamic
10.123.11.15 19   00:22:4D:4B:06:04  eth 0/2            Dynamic
10.123.11.17 19   B8:EE:65:4C:39:F1  eth 0/2            Dynamic
10.123.11.19 19   18:03:73:E9:14:F9  eth 0/2            Dynamic
10.123.11.20 19   E0:DB:55:E9:39:DD  eth 0/2            Dynamic
10.123.11.22 19   A4:1F:72:52:D2:C0  eth 0/2            Dynamic
10.123.11.26 000:21:70:14:8F:8D  eth 0/2            Dynamic
10.123.11.33 19   34:17:EB:A6:CC:A9  eth 0/2            Dynamic
10.123.11.35 19   00:11:11:AE:DD:18  eth 0/2            Dynamic
10.123.11.36 000:1A:A0:4F:35:D1  eth 0/2            Dynamic
10.123.11.39 19   B8:AC:6F:43:C4:06  eth 0/2            Dynamic
10.123.11.42 000:21:70:3E:06:F3  eth 0/2            Dynamic
10.123.11.45 03C:18:A0:01:B7:62  eth 0/2            Dynamic
10.123.11.46 0D4:BE:D9:9B:E4:D3  eth 0/2            Dynamic
10.123.11.47 000:1A:A0:53:6E:93  eth 0/2            Dynamic
10.123.11.48 034:17:EB:A6:03:2E  eth 0/2            Dynamic
10.123.11.54 000:21:70:3E:06:CC  eth 0/2            Dynamic
10.123.11.55 0F8:B1:56:A1:D2:70  eth 0/2            Dynamic
10.123.11.59 078:45:C4:39:96:E3  eth 0/2            Dynamic
10.123.11.61 19   34:17:EB:B3:07:D8  eth 0/2            Dynamic
10.123.11.66 19   00:24:D6:39:6A:A8  eth 0/2            Dynamic
10.123.11.70 000:1A:A0:4F:36:05  eth 0/2            Dynamic
10.123.11.77 19   00:1E:0B:3F:19:D1  eth 0/2            Dynamic
10.123.11.82 19   F0:4D:A2:39:09:F0  eth 0/2            Dynamic
10.123.11.84 19   1C:3E:84:99:26:29  eth 0/2            Dynamic
10.123.11.89 19   00:24:E8:05:64:43  eth 0/2            Dynamic
10.123.11.97 034:17:EB:A6:D2:B7  eth 0/2            Dynamic
10.123.11.98 05C:26:0A:05:D0:7A  eth 0/2            Dynamic
10.123.11.99 0D4:BE:D9:A6:08:C1  eth 0/2            Dynamic
10.123.11.1040F8:B1:56:A2:DA:EB  eth 0/2            Dynamic
10.123.11.105000:12:3F:CC:09:47  eth 0/2            Dynamic
10.123.11.109000:1A:A0:4B:68:AE  eth 0/2            Dynamic
10.123.11.11819   00:11:11:72:43:69  eth 0/2            Dynamic
10.123.11.12119   34:17:EB:B4:11:5C  eth 0/2            Dynamic
10.123.11.12519   00:12:3F:C9:E7:76  eth 0/2            Dynamic
10.123.11.12619   00:13:72:1D:F6:45  eth 0/2            Dynamic
10.123.11.127000:21:70:05:B8:8B  eth 0/2            Dynamic
10.123.11.129000:25:64:C8:BD:A3  eth 0/2            Dynamic
10.123.11.1320D4:BE:D9:A5:92:69  eth 0/2            Dynamic
10.123.11.135034:E6:D7:15:26:65  eth 0/2            Dynamic
10.123.11.137000:24:E8:0B:6D:F9  eth 0/2            Dynamic
10.123.11.138000:21:70:05:4B:17  eth 0/2            Dynamic
10.123.11.139000:24:E8:05:60:90  eth 0/2            Dynamic
10.123.11.14619   EC:F4:BB:56:AB:B5  eth 0/2            Dynamic
10.123.11.15805C:26:0A:6B:18:DF  eth 0/2            Dynamic
10.123.11.1590D4:BE:D9:A6:09:F3  eth 0/2            Dynamic
10.123.11.1600(Unresolved)   eth 0/2            Dynamic
10.123.11.162000:12:3F:CB:D9:9A  eth 0/2            Dynamic
10.123.11.16419   34:17:EB:B3:1C:23  eth 0/2            Dynamic
10.123.11.16619   34:17:EB:B1:11:84  eth 0/2            Dynamic
10.123.11.172000:1A:A0:4B:6B:DC  eth 0/2            Dynamic
10.123.11.174000:21:70:17:F5:5A  eth 0/2            Dynamic
10.123.11.18419   F8:BC:12:7C:C5:21  eth 0/2            Dynamic
10.123.11.18819   00:12:3F:CA:AB:3B  eth 0/2            Dynamic
10.123.11.198000:13:72:BF:05:86  eth 0/2            Dynamic
10.123.11.202000:1A:A0:7B:13:AD  eth 0/2            Dynamic
10.123.11.21719   F8:B1:56:A2:34:FF  eth 0/2            Dynamic
10.123.11.21919   B8:CA:3A:BE:D9:98  eth 0/2            Dynamic
10.123.11.225034:E6:D7:03:A4:C4  eth 0/2            Dynamic
10.123.11.235000:21:70:DE:44:D6  eth 0/2            Dynamic
10.123.11.23719   F0:1F:AF:4A:EC:FA  eth 0/2            Dynamic
10.123.16.33 000:22:75:16:FB:6B  eth 0/2            Dynamic
10.123.16.42 090:18:7C:6B:EF:14  eth 0/2            Dynamic
10.123.18.4  018:03:73:C5:FE:B4  eth 0/2            Dynamic
10.123.18.23 0(Unresolved)   eth 0/2            Dynamic
10.124.1.100 19   00:18:19:5B:F3:00  eth 0/2            Dynamic
10.124.12.1  000:18:19:5B:F3:00  eth 0/2            Dynamic
10.124.12.11 19   00:18:19:5B:F3:00  eth 0/2            Dynamic
10.124.12.23 19   00:18:19:5B:F3:00  eth 0/2            Dynamic
10.124.12.31 19   00:18:19:5B:F3:00  eth 0/2            Dynamic
10.124.12.51 19   00:18:19:5B:F3:00  eth 0/2            Dynamic
10.124.12.54 000:18:19:5B:F3:00  eth 0/2            Dynamic
10.124.12.55 000:18:19:5B:F3:00  eth 0/2            Dynamic
10.124.12.65 000:18:19:5B:F3:00  eth 0/2            Dynamic
10.124.12.70 19   00:18:19:5B:F3:00  eth 0/2            Dynamic
10.124.12.98 000:18:19:5B:F3:00  eth 0/2            Dynamic

I do see there are some unresolved as well.

Adtran said that the ARP limit on the 3450 is 256 per interface. Yesterday, there were 281 entries. There are 222 above this time.

Here are the interfaces:

router#sh int eth 0/1

eth 0/1 is UP, line protocol is UP

  Description:

  Hardware address is 00:A0:C8:C5:C2:AD

  Ip address is x.x.x.x, netmask is 255.255.255.252

  IP MTU is 1500 bytes

  BW is 100000 Kbit

  100Mb/s, full-duplex

  ARP type: ARPA; ARP timeout is 20 minutes

  Last clearing of "show interface" counters: 01:58:41

  5 minute input rate 5090624 bits/sec, 974 packets/sec

  5 minute output rate 1964424 bits/sec, 800 packets/sec

    Queueing method: fifo

    Output queue: 0/256/0 (size/max total/drops)

    Interface Shaper: NOT ENABLED

    8106177 packets input, 1874094345 bytes

    8106177 unicasts, 0 broadcasts, 0 multicasts input

    0 unknown protocol, 0 symbol errors, 0 discards

    791 input errors, 0 runts, 0 giants

    791 no buffer, 0 overruns, 0 internal receive errors

    0 alignment errors, 0 crc errors

    6296817 packets output, 1750741625 bytes

    6296805 unicasts, 12 broadcasts, 0 multicasts output

    0 output errors, 0 deferred, 0 discards

    0 single, 0 multiple, 0 late collisions

    0 excessive collisions, 0 underruns

    0 internal transmit errors, 0 carrier sense errors

    0 resets, 0 throttles

router#sh int eth 0/2

eth 0/2 is UP, line protocol is UP

  Description: LAN Block 10.123.0.0/16

  Hardware address is 00:A0:C8:C5:C2:AE

  Ip address is 10.123.1.1, netmask is 255.255.0.0

  Secondary IP:

    10.124.1.1, 255.255.0.0

  IP MTU is 1500 bytes

  BW is 100000 Kbit

  100Mb/s, full-duplex

  ARP type: ARPA; ARP timeout is 20 minutes

  Last clearing of "show interface" counters: 01:58:44

  5 minute input rate 2045504 bits/sec, 865 packets/sec

  5 minute output rate 5057096 bits/sec, 979 packets/sec

    Queueing method: fifo

    Output queue: 0/256/0 (size/max total/drops)

    Interface Shaper: NOT ENABLED

    6744450 packets input, 1819053612 bytes

    6511615 unicasts, 232835 broadcasts, 0 multicasts input

    15624 unknown protocol, 0 symbol errors, 0 discards

    1160 input errors, 0 runts, 0 giants

    1160 no buffer, 0 overruns, 0 internal receive errors

    0 alignment errors, 0 crc errors

    8103298 packets output, 1786931986 bytes

    8004204 unicasts, 99094 broadcasts, 0 multicasts output

    0 output errors, 0 deferred, 0 discards

    0 single, 0 multiple, 0 late collisions

    0 excessive collisions, 0 underruns

    0 internal transmit errors, 0 carrier sense errors

    0 resets, 0 throttles

router#

ip ffe is turned on both the interfaces.

no lldp send-and-receive is off:

router#sh run int eth 0/1

Building configuration...

!

!

interface eth 0/1

  description I1L:

  speed 100

  ip address  x.x.x.x  255.255.255.252

  no shutdown

  no lldp send-and-receive

!

end

router#sh run int eth 0/2

Building configuration...

!

!

interface eth 0/2

  description LAN Block 10.123.0.0/16

  speed 100

  ip address  10.123.1.1  255.255.0.0

  ip address  10.124.1.1  255.255.0.0  secondary

  no shutdown

  no lldp send-and-receive

!

end

router#

Any thoughts on whether the number of lines in the arp cache really is the source of the problem and a larger router is needed (4305?)? Might there be a PacketPerSecond limit we're hitting? PPS can be up to 1300 each direction.

Or something else?

The CPU is getting up to 100% at times, with the PacketRouting task occasionally jumping up to 80-90%.

Thanks.

Tags (3)
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3 Replies
rkhanso
New Contributor

Re: TTL in show arp the same for all entries

I forgot to add...

If you wait 5 minutes and run a sho arp again,  the numbers are the same. They didn't change/decriment.

Anonymous
Not applicable

Re: TTL in show arp the same for all entries

Roger,

You will want to verify that the devices that the ethernet ports connect to are also hard-set to 100/full. It is Adtran's recommendation that these settings match up. So if the ethernet interfaces are hard-set to 100/full, then the peer devices ethernet ports should also be hard-set to 100/full (and not set to auto).

Also, which firmware is currently running on the 4305? You may want to try enabling FFE if you are on firmware previous to R10.4. It is on by default in firmware revisions R10.4 and later.

Let us know if you have any questions.

Thanks,

Noor

rkhanso
New Contributor

Re: TTL in show arp the same for all entries

It turns out that the router was under-powered. Adtran said there's a 256 device limit per interface. At times, this router had near 300 devices on the LAN interface.

It's going to be replaced with a larger Adtran or a Cisco router.