EOS napalm=4.0.0 get_bgp_neighbors() returning error for Arista 7050CX3M

[vaderisback77]

Description of Issue/Question

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get_bgp_neighbors() is returning

AttributeError: 'NoneType' object has no attribute 'group'

when run on Arista DCS-7050CX3M-32S-F platform. We also tested Arista DCS-7050TX-64-F but we are not seeing this error there. It looks like a platform specific napalm bug.

Did you follow the steps from https://github.com/napalm-automation/napalm#faq

(Place an x between the square brackets where applicable)

• [X] Yes
• [] No

Setup

napalm version

(Paste verbatim output from pip freeze | grep napalm between quotes below)

(olympus_nqa_napalm_bug) ➜  ~ pip freeze | grep napalm
napalm==4.0.0

Network operating system version

(Paste verbatim output from show version - or equivalent - between quotes below)

nqa3-7050CX3M-32S-E10A-36.15:52:25#show version
Arista DCS-7050CX3M-32S-F
Hardware version: 11.20
Serial number: JPE21315205
Hardware MAC address: 2cdd.e99b.f677
System MAC address: 2cdd.e99b.f677

Software image version: 4.27.2F-DPE
Architecture: i686
Internal build version: 4.27.2F-DPE-26069621.4272F
Internal build ID: d3ac3428-f798-4904-aed2-20e36661c487
Image format version: 2.0
Image optimization: DPE

Uptime: 1 week, 0 days, 18 hours and 1 minute
Total memory: 8147140 kB
Free memory: 5472420 kB

Steps to Reproduce the Issue

Error Traceback

(Paste the complete traceback of the exception between quotes below)

device.get_bgp_neighbors()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/opt/rh/rh-python38/root/usr/local/lib/python3.8/site-packages/olympus_nqa/Device.py", line 525, in get_bgp_neighbors
    return executor()
  File "/opt/rh/rh-python38/root/usr/local/lib/python3.8/site-packages/olympus_nqa/Device.py", line 172, in _run
    return getattr(self.device, method)(*args, **kwargs)
  File "/opt/rh/rh-python38/root/usr/local/lib/python3.8/site-packages/napalm/eos/eos.py", line 748, in get_bgp_neighbors
    "remote_as": napalm.base.helpers.as_number(neighbor_info.group("as")),
AttributeError: 'NoneType' object has no attribute 'group'

[vaderisback77]

Any updates?

[ktbyers]

@vaderisback77 It is probably better to create a fix and submit a pull-request on it (then waiting for someone to help you).

[kjsanjay]

One of the BGP blocks we're seeing is

BGP neighbor is 111.1.3.1, remote AS 31898, external link
  BGP version 4, remote router ID 111.1.3.1, VRF VPN-DRG-2557
  BGP state is Established, up for 5d00h
    IPv4 Unicast:                     0         0              0                   0
    IPv6 Unicast:                     0         0              0                   0
Local AS is 60000, local router ID 111.1.3.0
  IPv4 Unicast: 111.1.3.0

The existing eos code does not seem to expect/handle IPv4 Unicast: 111.1.3.0 line

[vaderisback77]

@vaderisback77 It is probably better to create a fix and submit a pull-request on it (then waiting for someone to help you).

Thanks.

[vaderisback77]

@vaderisback77 It is probably better to create a fix and submit a pull-request on it (then waiting for someone to help you).

I will have the bug fix PR out shortly.

[vaderisback77]

Submitted PR: https://github.com/napalm-automation/napalm/pull/1746

[bewing]

It looks like the root cause is additional information in the BGP neighborship output:

Local next hop for next hop self:
  IPv4 Unicast: missing (cannot send updates with next hop self)
  IPv6 Unicast: fe80::a8c1:abff:fe61:5688

[bewing]

Closed by #1746